{"id":18639,"date":"2025-01-08T12:49:17","date_gmt":"2025-01-08T04:49:17","guid":{"rendered":"https:\/\/scubatechphilippines.com\/scuba_blog\/?p=18639"},"modified":"2025-01-08T12:49:17","modified_gmt":"2025-01-08T04:49:17","slug":"pony-cylinder-scuba-diving","status":"publish","type":"post","link":"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/","title":{"rendered":"How To Use A Pony Cylinder For Diving"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\">How To Use A Pony Cylinder For Diving<\/h1>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Article Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#What-is-a-pony-cylinder\" >What is a pony cylinder?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#What-are-the-benefits-of-a-pony-cylinder\" >What are the benefits of a pony cylinder?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Choosing-the-right-pony-cylinder\" >Choosing the right pony cylinder<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#A-pony-cylinder-versus-a-%E2%80%98Spare-Air\" >A pony cylinder versus a &#8216;Spare Air&#8217;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#How-much-gas-does-a-pony-cylinder-provide\" >How much gas does a pony cylinder provide?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Gas-Management-For-Scuba-Divers\" >Gas Management For Scuba Divers<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Calculating-your-SAC-rate\" >Calculating your SAC rate<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#SAC-calculation-the-easy-way\" >SAC calculation the easy way<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Four-steps-to-SAC-rate-calculation\" >Four steps to SAC rate calculation<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#SAC-versus-RMV\" >SAC versus RMV<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#SAC-calculation-the-harder-way\" >SAC calculation the harder way<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Calculating-minimum-pony-cylinder-volume-for-safe-ascent\" >Calculating minimum pony cylinder volume for safe ascent<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Gas-Management-For-Scuba-Divers-2\" >Gas Management For Scuba Divers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#When-is-using-a-pony-cylinder-recommended\" >When is using a pony cylinder recommended?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Cold-water-diving\" >Cold water diving<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Deep-diving\" >Deep diving<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Overhead-environment-diving\" >Overhead environment diving<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#How-is-a-pony-cylinder-set-up-and-configured\" >How is a pony cylinder set up and configured?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#The-pony-cylinder-clipped-to-the-front-BCD-D-rings\" >The pony cylinder clipped to the front BCD D-rings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#The-pony-cylinder-clamped-to-the-primary-cylinder\" >The pony cylinder clamped to the primary cylinder<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#What-regulators-to-use-with-pony-cylinders\" >What regulators to use with pony cylinders?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Gas-Management-For-Scuba-Divers-3\" >Gas Management For Scuba Divers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#About-The-Author\" >About The Author<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinder-scuba-diving\/#Purchase-my-exclusive-diving-ebooks\" >Purchase my exclusive diving ebooks!<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What-is-a-pony-cylinder\"><\/span>What is a pony cylinder?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A pony cylinder is an additional small cylinder carried by scuba divers as a contingency for gas depletion emergencies. A pony cylinder has its own dedicated regulator and is considered a redundant, independent gas source.<\/p>\n\n\n\n<p>Equipping yourself with a pony cylinder increases your self-sufficiency. It enables you to deal with any gas-related emergency without being reliant on a diving buddy to donate their alternate air source or having to resort to last-ditch, less-than-reliable, diving survival skills like the Controlled Emergency Swimming Ascent (CESA). <\/p>\n\n\n\n<p>Diving buddies can prove unreliable, and performing a real-life CESA from realistically deeper diving depths is not the same as doing one on a full breath from 6-9m shallow depths in training.<\/p>\n\n\n\n<div class=\"scuba-b4-h2-2\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-1489608013\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"2393012471\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What-are-the-benefits-of-a-pony-cylinder\"><\/span>What are the benefits of a pony cylinder?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Because the diver carries this pony cylinder with them, it is immediately available to them throughout their dive. The diver is self-reliant and their survival does not depend upon the competency of their buddy. They have the physical and psychological security of knowing they can always reach the surface safely if they make a mistake in their gas monitoring or suffer a regulator failure.<\/p>\n\n\n\n<p>While a scuba diver might endeavour to use less gas when scuba diving, there is always the risk of regulator failure or some other unforeseen event that will raise their air consumption rate or delay their bottom time before surfacing.<\/p>\n\n\n\n<p>Experienced divers and instructors consider them highly advisable for <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/advanced_wreck_diving_techniques\/\">wreck diving<\/a> and also deep diving, which has a more significant risk. High-quality specialist recreational diving courses&nbsp;will typically include tuition on how to use pony cylinders or other redundant gas sources.<\/p>\n\n\n\n<p class=\"has-text-align-center has-everlasting-sky-gradient-background has-background\"><strong>See my comprehensive article explaining&nbsp;<a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/what-are-the-risks-of-deep-diving\/\">Deep Diving Risks<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Choosing-the-right-pony-cylinder\"><\/span>Choosing the right pony cylinder<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A-pony-cylinder-versus-a-%E2%80%98Spare-Air\"><\/span>A pony cylinder versus a &#8216;Spare Air&#8217;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\">\n<p>A true pony cylinder is different to a Spare Air system. A Spare Air system would be classed as an &#8220;emergency ascent bottle&#8221;. Despite manufacturer claims, they only provide the typical diver with a few desperate breaths as they rush to the surface, whereas a pony cylinder enabled the diver to conduct a normal safe ascent and safety stop. <\/p>\n\n\n\n<p>The essential difference is that a pony cylinder <em>ends the gas emergency<\/em>, whereas an emergency ascent bottle may help the diver survive the ongoing emergency. <\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>Spare Air systems don&#8217;t end gas emergencies.<\/strong> <\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>Pony bottles do.<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\">\n<iframe sandbox=\"allow-popups allow-scripts allow-modals allow-forms allow-same-origin\" style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=scubtechphil-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B00NP65EKM&amp;asins=B00NP65EKM&amp;linkId=2be2c9f71508c874306fd5eea3bd73a0&amp;show_border=false&amp;link_opens_in_new_window=true\"><\/iframe>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How-much-gas-does-a-pony-cylinder-provide\"><\/span>How much gas does a pony cylinder provide?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>The table below provides metric specifications for the three most popular pony cylinder options; AL19, AL30 and AL40. I have also included the two Spare Air cylinder sizes (3 and 6 cu ft) for comparison.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" width=\"300\" height=\"208\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2011\/06\/Pony-Cylinders-Sizes-300x208.jpg\" alt=\"Pony Cylinders as redundant air sources\" class=\"wp-image-95\" title=\"Pony Cylinders Sizes\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2011\/06\/Pony-Cylinders-Sizes-300x208.jpg 300w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2011\/06\/Pony-Cylinders-Sizes.jpg 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>For greater clarity, I have calculated how many minutes of gas each cylinder would provide during a direct four-minute ascent from 40m\/130&#8242; (avg 3 ata) across a range of <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/\">Surface Air Consumption<\/a> (SAC) rates.<\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter is-style-stripes\" style=\"font-size:14px\"><table class=\"has-palette-color-4-color has-palette-color-5-background-color has-text-color has-background has-fixed-layout mtr-table mtr-thead-th\"><thead><tr><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">Cylinder Specs<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">Spare Air <br>3 cu ft<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">Spare Air<br>6 cu ft<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">AL19<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">AL30<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">AL40<\/div><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">Metric Water Volume<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">.5L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">1L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">2.7L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">4.3L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">5.7L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">Gas Volume @200 bar<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">100L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">200L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">540L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">860L<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">1140L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\"><strong>Gas Duration<br><\/strong>10m\/min from 40m<br>(4-minute ascent)<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\"><\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">SAC 40L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">50 secs<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">1.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">4.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">7 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">9.5 min<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">SAC 30L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">66 secs<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">2.2 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">6 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">9.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">12.5 min<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">SAC 20L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">1.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">3.3 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">9 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">14 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">19 min<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Cylinder Specs\"><div class=\"mtr-cell-content\">SAC 10L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air 3 cu ft\"><div class=\"mtr-cell-content\">3.2 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Spare Air6 cu ft\"><div class=\"mtr-cell-content\">6.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL19\"><div class=\"mtr-cell-content\">18 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL30\"><div class=\"mtr-cell-content\">28.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"AL40\"><div class=\"mtr-cell-content\">38 min<\/div><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>From the above table, it is clear to see that the Spare Air systems do not provide sufficient gas; they would empty before reaching the surface. Even if using the larger capacity Spare Air, the diver would need an exceptionally low SAC rate to reach the surface. Low SAC rates rarely happen during diving emergencies. In every instance, a full-size pony cylinder has a sufficient gas capacity to get the diver up safely.<\/p>\n\n\n\n<p>It is worth bearing in mind that a typical recreational-level diver has a routine diving SAC rate between 20-30L\/min. That gas consumption rate reduces with experience and as diving skill proficiency improves with <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-diving-deliberate-practice\/\">deliberate practice<\/a>. <\/p>\n\n\n\n<p>However, the SAC rate can grow by a factor of 10-20x<a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/stress-management-and-panic-response-in-scuba-diving-training\/\"> if the diver becomes psychologically stressed<\/a>. I have personally observed SAC rates increase by 80-100x in full-blown active panic with heavy exertion.<\/p>\n\n\n\n<p>When considering what size pony cylinder you need, do not base your calculations upon the best-case scenario with a relaxed breathing rate. Assume that psychological stress will have an effect on your respiratory rate during real-world gas depletion emergencies.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<div class=\"scuba-b4-h2-3\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-2841214954\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"6151212517\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Gas-Management-For-Scuba-Divers\"><\/span><strong>Gas Management For Scuba Divers<\/strong> <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg\" alt=\"\" class=\"wp-image-26264\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.469), 20px);\">The comprehensive, illustrated, metric guide to advanced gas planning and management for safer scuba diving. <strong>Only $9!<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><em> 60 Pages. <\/em>Printable PDF format. Fully Illustrated.<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.313), 18px);\"><strong><a href=\"https:\/\/www.buymeacoffee.com\/andydavistech\/e\/233191\" target=\"_blank\" rel=\"noreferrer noopener\">Gas Management For Scuba Divers eBook Download<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Calculating-your-SAC-rate\"><\/span>Calculating your SAC rate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Before I describe how to calculate your <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/#Surface-Air-Consumption-Calculation\">Surface Air Consumption<\/a> (SAC) rate, I will caveat that I teach all of my courses using the Metric system. While I do have many students from the USA, all agree that <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/\">scuba gas planning<\/a> becomes far more simple when metric calculations are used. I recommend that serious and committed divers make the effort to learn metric gas calculation; it doesn&#8217;t take long to crossover and once done it will save you a lot of time and frustration.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SAC-calculation-the-easy-way\"><\/span>SAC calculation the easy way<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>If you own a diving computer that provides an <em>average depth<\/em> figure in the dive log it is easy to calculate an accurate SAC rate for your dive\/s. You only have to manually record your SPG readings at the start and end of your dive. <\/p>\n\n\n\n<p>This method is more accurate and realistic because it averages your gas consumption over the length of real dives. If you perform this quick calculation after every dive, you will very quickly develop an intuitive understanding of how your gas consumption varies under different diving conditions and levels of exertion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Four-steps-to-SAC-rate-calculation\"><\/span>Four steps to SAC rate calculation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Calculating gas volume used:<\/strong> (start bar &#8211; end bar) x cylinder volume (L)<\/li>\n\n\n\n<li><strong>Gas consumption at depth per minute (L): <\/strong>gas volume used \u00f7 dive time<\/li>\n\n\n\n<li><strong>Convert avg depth to ATA:<\/strong>  (avg depth \u00f7 10) + 1<\/li>\n\n\n\n<li><strong>SAC Rate: <\/strong>gas consumption per minute (L) \u00f7 ATA<\/li>\n<\/ol>\n\n\n\n<p class=\"has-text-align-center\"><em>Example:<\/em><\/p>\n\n\n\n<p class=\"has-text-align-center\">(200 bar &#8211; 50 bar) x 11L = 1650L<\/p>\n\n\n\n<p class=\"has-text-align-center\">1650L \u00f7 25 minutes = 66L\/min<\/p>\n\n\n\n<p class=\"has-text-align-center\">(20m \u00f7 10) + 1 = 3 ATA<\/p>\n\n\n\n<p class=\"has-text-align-center\">66L\/min \u00f7 3 ATA = <strong>22L\/min SAC<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SAC-versus-RMV\"><\/span>SAC versus RMV<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>The gas consumption rate at depth is typically referred to as <strong><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/#The-RMV-calculation\">Respiratory Minute Volume<\/a><\/strong> (RMV). This is a medical term and indicates the actual volume of gas respired per minute. This reflects the diver breathing gas from their cylinder at a higher density when underwater. In contrast, SAC is specifically gas consumption at the surface: 1 ata.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SAC-calculation-the-harder-way\"><\/span>SAC calculation the harder way<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>If you don&#8217;t have a dive computer that records your average depth on dives, you will have to record your gas consumption in water over a designated period of time at a constant depth. For instance, you could spend 10 minutes finning at 30m\/100&#8242; depth and record your SPG readings before and after that 10-minute period. Record that data on a slate or underwater notebook and perform the same calculations as above when you return from the dive. <\/p>\n\n\n\n<p>This method tends to be less accurate because it is a smaller sample size, doesn&#8217;t reflect respiratory changes as the dive progresses, and because divers have an inherent tendency to breathe less when making SAC rate recordings. Do remember that you are calculating your SAC rate for safety purposes in gas management; not for bragging rights amongst your diving peers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Calculating-minimum-pony-cylinder-volume-for-safe-ascent\"><\/span>Calculating minimum pony cylinder volume for safe ascent<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>For this calculation, it is prudent to allocate 1 min at bottom depth, a safe 10m\/min <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/best-ascent-speed-scuba-diving\/\">ascent rate<\/a>, and completion of a 3 min safety stop at 5m, followed by an ascent to the surface at a slower 5m\/min ascent rate.<\/p>\n\n\n\n<p>This calculation is known as <strong><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/#What-is-a-Rock-Bottom-Gas-Reserve\">Rock Bottom Gas Management<\/a><\/strong>. It incorporates the conservative assumption that the diver\/s require some time at the bottom depth to gather their senses or deal with any issues before initiating their ascent. It also plans for the diver to ascend at a normal safe ascent rate, completing their safety stop and then ascending at half normal ascent speed to the surface.<\/p>\n\n\n\n<p>In this example, I have assumed the diver has a SAC rate of 30L\/min (lower than average) and a bottom depth of 30m\/100.<\/p>\n\n\n\n<figure class=\"wp-block-table alignfull is-style-stripes\" style=\"font-size:12px\"><table class=\"has-palette-color-5-background-color has-background has-fixed-layout mtr-table mtr-thead-th\"><thead><tr><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\">Ascent Phase<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\">Avg Depth<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\">ATA<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\">SAC<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\">RMV<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\">Time<\/div><\/th><th class=\"has-text-align-center mtr-th-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">Gas Vol Consumed<\/div><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\">1 min bottom<strong><\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\">30m<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\">4<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\">30L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\">120L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\">1 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">120L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\">Ascent to safety stop<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\">17.5m<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\">2.75<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\">30L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\">82.5L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\">2.5 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">206L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\">3 min safety stop<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\">5m<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\">1.5<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\">30L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\">45L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\">3 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">135L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\">Ascent from stop<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\">2.5m<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\">1.25<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\">30L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\">38L\/min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\">1 min<\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">37.5L<\/div><\/td><\/tr><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\">Total gas\u00a0<strong>499L<\/strong><\/div><\/td><\/tr><\/tbody><tfoot><tr><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Ascent Phase\"><div class=\"mtr-cell-content\"><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Avg Depth\"><div class=\"mtr-cell-content\"><strong><em>(depth\u2013stop depth) \u00f72<br>+ stop depth<\/em><\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"ATA\"><div class=\"mtr-cell-content\"><strong><em>(Depth\u00f710) +1<\/em><\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"SAC\"><div class=\"mtr-cell-content\"><strong><em>Diver calculated<\/em><\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"RMV\"><div class=\"mtr-cell-content\"><strong><em>ATA x SAC<\/em><\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Time\"><div class=\"mtr-cell-content\"><strong>Time at Avg Depth<\/strong><\/div><\/td><td class=\"has-text-align-center mtr-td-tag\" data-align=\"center\" data-mtr-content=\"Gas Vol Consumed\"><div class=\"mtr-cell-content\"><strong><em>RMV x Time<\/em><\/strong><\/div><\/td><\/tr><\/tfoot><\/table><\/figure>\n\n\n\n<p>Using that example of SAC 30L\/min, we can see that an AL19 (540L) pony cylinder is just sufficient for a safe ascent from 30m\/100&#8242; depth. <\/p>\n\n\n\n<p>Do, however, consider that the psychological stress of dealing with a real out-of-gas emergency could substantially increase the diver\u2019s SAC. It is worth considering using a larger cylinder as a contingency for diver stress in an emergency.<\/p>\n\n\n\n<p>Any diver considering doing training for wreck penetration diving should endeavour to develop robust fundamental diving skills and their ability for stress management. That training is usually only delivered on higher-quality training courses. You get what you pay for.<\/p>\n\n\n\n<p>Improved fundamental diving skills will&nbsp;<a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/how-to-use-less-air-when-scuba-diving\/\">reduce your overall SAC rate<\/a>, whilst developing stress management and resiliency will help prevent your SAC rate from becoming dangerously exaggerated when things eventually go wrong.<\/p>\n\n\n\n<p class=\"has-text-align-center has-everlasting-sky-gradient-background has-background\"><strong>See my article&nbsp;<a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/how-to-use-less-air-when-scuba-diving\/\">How To Use Less Air When Scuba Diving<\/a><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Gas-Management-For-Scuba-Divers-2\"><\/span><strong>Gas Management For Scuba Divers<\/strong> <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg\" alt=\"\" class=\"wp-image-26264\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.469), 20px);\">The comprehensive, illustrated, metric guide to advanced gas planning and management for safer scuba diving. <strong>Only $9!<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><em> 60 Pages. <\/em>Printable PDF format. Fully Illustrated.<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.313), 18px);\"><strong><a href=\"https:\/\/www.buymeacoffee.com\/andydavistech\/e\/233191\" target=\"_blank\" rel=\"noreferrer noopener\">Gas Management For Scuba Divers eBook Download<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When-is-using-a-pony-cylinder-recommended\"><\/span>When is using a pony cylinder recommended?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A pony cylinder can be considered insurance against losing your gas supply on a dive. That can happen for a number of predictable reasons; including regulator failure or a loss of situational awareness in SPG monitoring.<\/p>\n\n\n\n<p>There are a few specific circumstances where a pony cylinder becomes a very prudent addition to your dive gear. It is work noting that some dive training agencies actually mandate pony cylinders for specialist higher-level training; such as cavern, wreck and <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diver-courses\/\">deep diver courses<\/a>. <\/p>\n\n\n\n<p>Sadly, many dive training agencies still do not include or require pony cylinder training on those courses; primarily to keep course costs lower and increase sales volume.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cold-water-diving\"><\/span>Cold water diving<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>In very cold water the risk of free-flow increases due to ice formation inside the regulator&#8217;s first stage. A free flow at depth can easily deplete your primary diving cylinder before reaching the surface. <\/p>\n\n\n\n<p>High-quality regulators designed specifically with cold-water diving features reduce the incidence of these failures, but cannot eliminate them altogether. Don&#8217;t leave any regulator sitting around in very cold temperatures before using it for diving. Similarly, don&#8217;t test breathe a regulator above water when the temperature is close to freezing. Either of those <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/technical-diving-experience-paradox\/\">mistakes<\/a> can start ice formation inside the first stage before you even get into the water. <\/p>\n\n\n\n<p>Whilst you have the option of alternate air source donation from your <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/bad-dive-buddy-system-diving\/\">dive buddy<\/a>; this places a far greater demand on their own regulator. That can be enough to cause their regulator to free-flow also. Both divers would soon be out of gas supply.<\/p>\n\n\n\n<p>Entry-level students are taught to breathe from free-flowing regulators. In very cold water this is not an effective solution. The rush of air from the regulator can literally freeze the moisture in your mouth. This happened to me when I was a relatively novice diver. I suffered a free-flow at 36m depth while diving in a freshwater quarry in the depths of winter. Breathing the free-flowing regulator quickly encased my teeth with ice. It was not a pleasant experience. I actually bought my own pony cylinder system immediately after that incident.<\/p>\n\n\n\n<p class=\"has-text-align-center has-everlasting-sky-gradient-background has-background\"><strong>Read about this <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/regulator-hose-diving-emergency\/\">bizarre regulator failure I observed for real<\/a>.<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Deep-diving\"><\/span>Deep diving<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Recreational <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/what-are-the-risks-of-deep-diving\/\">deep diving exposes the diver to increasing risks<\/a>. Gas is consumed quicker, regulators are under higher gas demand, <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/nitrogen-narcosis-sedation-consciousness\/\">nitrogen narcosis diminishes situational awareness<\/a> (SPG monitoring and buddy proximity) and shorter no-stop bottom times increase the risk of accidentally incurring emergency decompression stops. <\/p>\n\n\n\n<p>Having a redundant gas supply for recreational deep diving is a very prudent decision. It ensures that you can reach the surface if any foreseeable risk actually presents itself.<\/p>\n\n\n\n<p class=\"has-text-align-center has-everlasting-sky-gradient-background has-background\"><strong>See my comprehensive article explaining&nbsp;<a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/what-are-the-risks-of-deep-diving\/\">Deep Diving Risks<\/a><\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overhead-environment-diving\"><\/span>Overhead environment diving<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Recreational cavern and wreck diving courses may limit penetration to the &#8216;light zone&#8217; where the exit is observable, but there is a multitude of factors which can impede divers from exiting into open water quickly. Those factors include the loss of visibility, spatial disorientation, <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wreck-diving-risks\/\">entanglement<\/a> and entrapment.<\/p>\n\n\n\n<p>Air-sharing with a buddy can also be more problematic in overhead environment diving. The divers may have to pass through confined spaces where they cannot easily swim side-by-side whilst sharing gas.<\/p>\n\n\n\n<p>As a technical-level wreck instructor with three decades of experience, I would not consider entering a wreck without a redundant gas supply available. Yet, I routinely observe novice divers contentedly penetrating wrecks with a single cylinder. It is hard to appreciate risks until you&#8217;ve actually encountered them. Sadly, for some divers each year, they don&#8217;t survive those encounters in order to learn the lessons.<\/p>\n\n\n\n<p class=\"has-text-align-center has-everlasting-sky-gradient-background has-background\"><strong>See my article on <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pony-cylinders-and-redundant-air-sources-for-wreck-diving\/\">Pony Cylinders And Wreck Diving<\/a><\/strong><\/p>\n\n\n\n<div class=\"scuba-b4-h2-4\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-2166547735\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"2954736365\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How-is-a-pony-cylinder-set-up-and-configured\"><\/span>How is a pony cylinder set up and configured?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>There are two common methods for carrying a pony cylinder; clamped to the primary cylinder at the rear or hung by boltsnaps from D-rings on the divers\u2019 BCD at the front.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"1002\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-1024x1002.jpg\" alt=\"pony cylinder attachment methods\" class=\"wp-image-18682\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-1024x1002.jpg 1024w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-300x293.jpg 300w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-768x751.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-1536x1503.jpg 1536w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options-45x45.jpg 45w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/pony-cylinder-mounting-options.jpg 1704w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">(left) front-clipped pony cylinder | (right) rear-mounted pony cylinder<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The-pony-cylinder-clipped-to-the-front-BCD-D-rings\"><\/span>The pony cylinder clipped to the front BCD D-rings<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\">\n<p>Clipping a pony cylinder to the front of the BCD, via shoulder and waist D-rings, tends to be more popular with experienced divers. This method gives a lot more flexibility; including the ability to observe any leaks from the system, retain clean hose routing and detach the cylinder at any time during the dive; enabling it to be donatable to other divers should the need arise.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\">\n<iframe sandbox=\"allow-popups allow-scripts allow-modals allow-forms allow-same-origin\" style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=scubtechphil-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B07J9LM1CH&amp;asins=B07J9LM1CH&amp;linkId=b633113695262e77cd945d655e0cdfa8&amp;show_border=false&amp;link_opens_in_new_window=true\"><\/iframe>\n<\/div>\n<\/div>\n\n\n\n<p>To configure a pony cylinder for front carry, you can buy a&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Stage-Bottle-Strap\/dp\/B07J9LM1CH?crid=2YWSW2KOMS2D0&amp;keywords=diving+cylinder+clamps&amp;qid=1671663276&amp;sprefix=diving+cylinder+clamp%2Caps%2C734&amp;sr=8-1&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=43e6e3fbf58556b4d40bdb7e7998750a&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">stage bottle kit<\/a>. These include bolt snaps at the neck and side of the cylinder, along with a worm-type clamp, nylon carrying handle and&nbsp;<a href=\"https:\/\/www.amazon.com\/dp\/B089DGS73G?psc=1&amp;pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=WACPREY3BR83SW4AW5R6&amp;pd_rd_wg=FPoh0&amp;pd_rd_w=SUeRf&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pd_rd_r=33f6e581-6bda-40bc-bd04-0c396d83a471&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=AACVUJ6SFQ2UJ&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExNEVDQUlPQU9COUVKJmVuY3J5cHRlZElkPUEwNTAyNDk0OENJRDYyVUpQM1ZWJmVuY3J5cHRlZEFkSWQ9QTA4MzAzMzMzOTdBTU41Vlk0Mk5KJndpZGdldE5hbWU9c3BfZGV0YWlsX3RoZW1hdGljJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ%3D%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=d53f7f0c44f38e83d04cca79e6f76e49&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">rubber hose retainer bands<\/a>. You could also make your own stage bottle kit from rope and individual hardware components bought from a dive shop.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.amazon.com\/xDeep-Deluxe-Diving-Backplate-Aluminum\/dp\/B0887DPLFX?crid=2747M4CZTJ2H9&amp;keywords=single+tank+wing+diving&amp;qid=1671665036&amp;sprefix=single+tank+wing+divi%2Caps%2C502&amp;sr=8-9&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=39a983a92e41709ee4ea1fea9ab2eae2&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">Backplate\/wing-style BCDs<\/a>&nbsp;are an ideal choice if using pony cylinders with this configuration; the harnesses have the D-rings in the right places.<\/p>\n\n\n\n<p>For wreck penetration, having the pony cylinder in front can also avoid delicate equipment from suffering accidental collisions with the wreck.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center\"><strong>Pros<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The cylinder valve can be manipulated during the dive<\/li>\n\n\n\n<li>Gas leaks can be seen<\/li>\n\n\n\n<li>No hose clutter<\/li>\n\n\n\n<li>Removeable and donatable during the dive<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center\"><strong>Cons<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Needs sturdy BCD D-rings as attachment points<\/li>\n\n\n\n<li>Slightly more complex to use<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The-pony-cylinder-clamped-to-the-primary-cylinder\"><\/span>The pony cylinder clamped to the primary cylinder<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>Clamping the pony cylinder to the primary tank at the rear is a very popular option with recreational divers. The location is unobtrusive, but care has to be taken to differentiate the pony cylinders\u2019 SPG and regulator second stage from the divers\u2019 primary ones. Confusion could lead to a gas depletion emergency.<\/p>\n\n\n\n<p>This method does not demand sturdy D-rings on the BCD shoulder and waist straps. The diver cannot manipulate the pony cylinder valve, so they cannot shut it down if it leaks, or open it in water if they neglect to turn it on pre-dive.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"360\" height=\"640\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/Stoney-Jul-05-42-edited.jpg\" alt=\"pony cylinder clamped to primary\" class=\"wp-image-18668\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/Stoney-Jul-05-42-edited.jpg 360w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/Stoney-Jul-05-42-edited-169x300.jpg 169w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center\"><strong>Pros<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Doesn\u2019t require a BCD with shoulder and waist D-rings.<\/li>\n\n\n\n<li>Unobtrusive location<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center\"><strong>Cons<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No access to the cylinder valve<\/li>\n\n\n\n<li>More hose clutter when diving<\/li>\n\n\n\n<li>Risk of confusion with primary cylinder regulators<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p>You can purchase a variety of&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Pony-Regulator\/dp\/B06Y1VFNBH?keywords=diving+pony+regulator&amp;qid=1671663378&amp;s=sports-and-fitness&amp;sr=1-1-spons&amp;psc=1&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVjExRThWSFBRQlk4JmVuY3J5cHRlZElkPUEwNDU5MDkyM0lESVdHOE9YWjZRUSZlbmNyeXB0ZWRBZElkPUEwMDQ3NTQzM1BBQjdUUzBCQkRQTSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=fe328bd8e29a10abd80e7878dd47afba&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">metal<\/a>&nbsp;or&nbsp;<a href=\"https:\/\/www.amazon.com\/Zeagle-Bottle-Straps-8029HD-Holder\/dp\/B001S6XDLS?crid=2YWSW2KOMS2D0&amp;keywords=diving+cylinder+clamps&amp;qid=1671663276&amp;sprefix=diving+cylinder+clamp%2Caps%2C734&amp;sr=8-20&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=e224b7b88e01927f977f5da2051dbe03&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">nylon webbing clamp<\/a>&nbsp;systems to secure pony cylinders onto your main tank.<\/p>\n\n\n\n<p>In general,&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Pony-Regulator\/dp\/B06Y1VFNBH?keywords=diving+pony+regulator&amp;qid=1671663378&amp;s=sports-and-fitness&amp;sr=1-1-spons&amp;psc=1&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVjExRThWSFBRQlk4JmVuY3J5cHRlZElkPUEwNDU5MDkyM0lESVdHOE9YWjZRUSZlbmNyeXB0ZWRBZElkPUEwMDQ3NTQzM1BBQjdUUzBCQkRQTSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=fe328bd8e29a10abd80e7878dd47afba&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">metal clamps<\/a>&nbsp;are preferable because they are more robust. Some models feature quick-release brackets.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\">\n<iframe sandbox=\"allow-popups allow-scripts allow-modals allow-forms allow-same-origin\" style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=scubtechphil-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B001S6XDLS&amp;asins=B001S6XDLS&amp;linkId=5793b5ad2aaa02765b262e62ad8c99a6&amp;show_border=false&amp;link_opens_in_new_window=true\"><\/iframe>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\">\n<iframe sandbox=\"allow-popups allow-scripts allow-modals allow-forms allow-same-origin\" style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=scubtechphil-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B002YGCHT0&amp;asins=B002YGCHT0&amp;linkId=5fd48ed0b05b3d5c146751c825b89a6e&amp;show_border=false&amp;link_opens_in_new_window=true\"><\/iframe>\n<\/div>\n<\/div>\n\n\n\n<p>You can purchase a variety of&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Pony-Regulator\/dp\/B06Y1VFNBH?keywords=diving+pony+regulator&amp;qid=1671663378&amp;s=sports-and-fitness&amp;sr=1-1-spons&amp;psc=1&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVjExRThWSFBRQlk4JmVuY3J5cHRlZElkPUEwNDU5MDkyM0lESVdHOE9YWjZRUSZlbmNyeXB0ZWRBZElkPUEwMDQ3NTQzM1BBQjdUUzBCQkRQTSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=fe328bd8e29a10abd80e7878dd47afba&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">metal<\/a>&nbsp;or&nbsp;<a href=\"https:\/\/www.amazon.com\/Zeagle-Bottle-Straps-8029HD-Holder\/dp\/B001S6XDLS?crid=2YWSW2KOMS2D0&amp;keywords=diving+cylinder+clamps&amp;qid=1671663276&amp;sprefix=diving+cylinder+clamp%2Caps%2C734&amp;sr=8-20&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=e224b7b88e01927f977f5da2051dbe03&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">nylon webbing clamp<\/a>&nbsp;systems to secure pony cylinders onto your main tank.<\/p>\n\n\n\n<p>In general,&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Pony-Regulator\/dp\/B06Y1VFNBH?keywords=diving+pony+regulator&amp;qid=1671663378&amp;s=sports-and-fitness&amp;sr=1-1-spons&amp;psc=1&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVjExRThWSFBRQlk4JmVuY3J5cHRlZElkPUEwNDU5MDkyM0lESVdHOE9YWjZRUSZlbmNyeXB0ZWRBZElkPUEwMDQ3NTQzM1BBQjdUUzBCQkRQTSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=fe328bd8e29a10abd80e7878dd47afba&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">metal clamps<\/a>&nbsp;are preferable because they are more robust. Some models feature quick-release brackets.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What-regulators-to-use-with-pony-cylinders\"><\/span>What regulators to use with pony cylinders?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\">\n<p>A regulator used with pony cylinders consists of a first-stage, second-stage and an SPG. You can use a&nbsp;<a href=\"https:\/\/www.amazon.com\/dp\/B0027BFXK2?psc=1&amp;pd_rd_i=B0027BFXK2&amp;pd_rd_w=8qqxQ&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=GJTG686J2CD8KFTMRGNH&amp;pd_rd_wg=YJpSa&amp;pd_rd_r=8b6d9d2a-f904-4370-80be-b0c66644176f&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFJNERQUDVIQlZGNkgmZW5jcnlwdGVkSWQ9QTA4NTI2MzIzSDNZMTkwVVhMRlVOJmVuY3J5cHRlZEFkSWQ9QTA0MDQ5MjRBWVdaWTNVRjJVWVgmd2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWMmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=71f42c817e7774c312efe0334c4d638e&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">full-size SPG<\/a>, or some divers are content with a&nbsp;<a href=\"https:\/\/www.amazon.com\/IST-Pony-bottle-gauge-5000\/dp\/B003515YDO?crid=2GCW54K0M1AC7&amp;keywords=pony+bottle+pressure+gauge&amp;qid=1671664422&amp;sr=8-6&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=36913378fdbea172167c4e3289d78b25&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">button-sized gauge<\/a>. I do not advise using button gauges on a rear-mounted pony cylinder; you should be able to monitor the gauge at all times.<\/p>\n\n\n\n<p>A<a href=\"https:\/\/www.amazon.com\/dp\/B00DY830O8?pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=R6ZK8DEH2P37XP3TBBQP&amp;pd_rd_wg=rG1W6&amp;pd_rd_w=J4Djn&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pd_rd_r=cc9902e6-2414-47fd-86f9-b6c99ccede07&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=A3N3UNP57GTLTF&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzOTFXNFc5S05WQlBMJmVuY3J5cHRlZElkPUEwNDk2Mzk2MkFOSklDODlSVlFXNiZlbmNyeXB0ZWRBZElkPUExMDE0ODcyMjg1NVRMVzNPN1BBUCZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&amp;th=1&amp;psc=1&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=4f1cc464b059418104054edbc2a0189c&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;6-9<\/a>&#8220;<a href=\"https:\/\/www.amazon.com\/dp\/B00DY830O8?pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=R6ZK8DEH2P37XP3TBBQP&amp;pd_rd_wg=rG1W6&amp;pd_rd_w=J4Djn&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pd_rd_r=cc9902e6-2414-47fd-86f9-b6c99ccede07&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=A3N3UNP57GTLTF&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzOTFXNFc5S05WQlBMJmVuY3J5cHRlZElkPUEwNDk2Mzk2MkFOSklDODlSVlFXNiZlbmNyeXB0ZWRBZElkPUExMDE0ODcyMjg1NVRMVzNPN1BBUCZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&amp;th=1&amp;psc=1&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=4f1cc464b059418104054edbc2a0189c&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\"> high-pressure SPG hose<\/a>&nbsp;is ideal for front-staged pony cylinders. For back-clamped ponies, a&nbsp;<a href=\"https:\/\/www.amazon.com\/dp\/B06Y1NWVRV?psc=1&amp;pd_rd_i=B06Y1NWVRV&amp;pd_rd_w=CF1Ce&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=W8GR6RFCFS186PY19DWZ&amp;pd_rd_wg=OiQG4&amp;pd_rd_r=bdb3ae66-f0ba-426d-b3e7-ee1aa5a354c3&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=A33ZN459YDXJGP&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzMzRTMzVFSzZCVzZSJmVuY3J5cHRlZElkPUEwMzU4NTM3M0M3MVJRMEVNR1hKSSZlbmNyeXB0ZWRBZElkPUEwNDk5NjcyMjUxUjJaVU1XM09OVyZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=caafcb0a028ca7eca54196fd1250aaa7&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">full-size 30<\/a>&#8220;<a href=\"https:\/\/www.amazon.com\/dp\/B06Y1NWVRV?psc=1&amp;pd_rd_i=B06Y1NWVRV&amp;pd_rd_w=CF1Ce&amp;content-id=amzn1.sym.3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_p=3309c9d3-bf37-499a-888c-9ce693c3483f&amp;pf_rd_r=W8GR6RFCFS186PY19DWZ&amp;pd_rd_wg=OiQG4&amp;pd_rd_r=bdb3ae66-f0ba-426d-b3e7-ee1aa5a354c3&amp;s=sporting-goods&amp;sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&amp;smid=A33ZN459YDXJGP&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzMzRTMzVFSzZCVzZSJmVuY3J5cHRlZElkPUEwMzU4NTM3M0M3MVJRMEVNR1hKSSZlbmNyeXB0ZWRBZElkPUEwNDk5NjcyMjUxUjJaVU1XM09OVyZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=caafcb0a028ca7eca54196fd1250aaa7&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\"> HP hose<\/a>&nbsp;is necessary.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\">\n<iframe sandbox=\"allow-popups allow-scripts allow-modals allow-forms allow-same-origin\" style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ss&amp;ref=as_ss_li_til&amp;ad_type=product_link&amp;tracking_id=scubtechphil-20&amp;language=en_US&amp;marketplace=amazon&amp;region=US&amp;placement=B06Y1VFNBH&amp;asins=B06Y1VFNBH&amp;linkId=78858f24de00975b1fe9ac502e12e9d8&amp;show_border=false&amp;link_opens_in_new_window=true\"><\/iframe>\n<\/div>\n<\/div>\n\n\n\n<p>A few diving manufacturers sell&nbsp;<a href=\"https:\/\/www.amazon.com\/XS-Scuba-Pony-Regulator\/dp\/B06Y1VFNBH?keywords=diving+pony+regulator&amp;qid=1671663378&amp;s=sports-and-fitness&amp;sr=1-1-spons&amp;psc=1&amp;smid=AZ2T72SM9NOY8&amp;spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVjExRThWSFBRQlk4JmVuY3J5cHRlZElkPUEwNDU5MDkyM0lESVdHOE9YWjZRUSZlbmNyeXB0ZWRBZElkPUEwMDQ3NTQzM1BBQjdUUzBCQkRQTSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU%3D&amp;linkCode=ll1&amp;tag=scubtechphil-20&amp;linkId=18b9980c971d0b42f0eb22882fd48e27&amp;language=en_US&amp;ref_=as_li_ss_tl\" target=\"_blank\" rel=\"noreferrer noopener\">dedicated regulator sets&nbsp;<\/a>for use with pony cylinders. These tend to be cheaper, but also lower quality and performance than primary regulators. Otherwise, you can make your own pony regulator; you just need a first stage, second stage and SPG.<\/p>\n\n\n\n<p>The main criterion for <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/advice-purchase-scuba-diving-regulator\/\">buying a pony cylinder regulator<\/a> is reliability. The system is for emergencies and, if needed, your life will rely upon it.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Gas-Management-For-Scuba-Divers-3\"><\/span><strong>Gas Management For Scuba Divers<\/strong> <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg\" alt=\"\" class=\"wp-image-26264\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.469), 20px);\">The comprehensive, illustrated, metric guide to advanced gas planning and management for safer scuba diving. <strong>Only $9!<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><em> 60 Pages. <\/em>Printable PDF format. Fully Illustrated.<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-center has-luminous-vivid-amber-background-color has-background\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.313), 18px);\"><strong><a href=\"https:\/\/www.buymeacoffee.com\/andydavistech\/e\/233191\" target=\"_blank\" rel=\"noreferrer noopener\">Gas Management For Scuba Divers eBook Download<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-content-justification-center is-layout-constrained wp-block-column-is-layout-constrained\" style=\"flex-basis:25%\">\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium is-resized is-style-default\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/andy-davis-technical-diving\/\"><img decoding=\"async\" width=\"300\" height=\"296\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-300x296.png\" alt=\"Andy Davis Technical Sidemount Wreck Diving Subic Bay Philippines RAID Courses Training\" class=\"wp-image-6812\" style=\"width:225px;height:222px\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-300x296.png 300w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-1024x1009.png 1024w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-768x757.png 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1.png 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-constrained wp-block-column-is-layout-constrained\" style=\"flex-basis:75%\">\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"About-The-Author\"><\/span>About The Author<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"274\" height=\"77\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1.png\" alt=\"\" class=\"wp-image-27046\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1.png 274w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1-250x70.png 250w\" sizes=\"(max-width: 274px) 100vw, 274px\" \/><\/a><\/figure>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/andy-davis-technical-diving\/\">Andy Davis<\/a> is a <a href=\"https:\/\/scubatechphilippines.com\/raid-diving-courses-philippines\/raid\/\">RAID<\/a>, PADI TecRec, ANDI, BSAC, and SSI-qualified independent <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/what-is-technical-diving\/\">technical diving<\/a> instructor who specializes in teaching <a href=\"https:\/\/scubatechphilippines.com\/sidemount-courses\/\">sidemount<\/a>, <a href=\"https:\/\/scubatechphilippines.com\/technical-diving-courses\/\">trimix<\/a>, and <a href=\"https:\/\/scubatechphilippines.com\/technical-diving-courses\/\">advanced wreck<\/a> diving courses.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p>Currently residing in <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subic-bay-wreck-diving-sites\/\">Subic Bay, Philippines<\/a>; he has amassed more than 10,000 open-circuit and CCR dives over three decades of challenging diving across the globe.<\/p>\n\n\n\n<p>Andy has published numerous diving magazine articles and designed advanced certification courses for several dive training agencies, He regularly tests and reviews new dive gear for scuba equipment manufacturers. Andy is currently writing a series of <a href=\"https:\/\/www.buymeacoffee.com\/andydavistech\/extras\">advanced diving books <\/a>and creating a range of <a href=\"https:\/\/www.redbubble.com\/people\/andydavistech\/shop\">tech diving clothing and accessories<\/a>.<\/p>\n\n\n\n<p>Prior to becoming a professional technical diving educator in 2006, Andy was a commissioned officer in the Royal Air Force and has served in Iraq, Afghanistan, Belize, and Cyprus.<\/p>\n\n\n\n<p>In 2023, Andy was named in the &#8220;<a rel=\"noreferrer noopener\" href=\"https:\/\/gue.com\/blog\/sidemount-andy-davies\/\" target=\"_blank\">Who&#8217;s Who of Sidemount<\/a>&#8221; list by GUE InDepth Magazine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-palette-color-7-color has-vivid-red-background-color has-text-color has-background has-link-color wp-elements-dd81a6de961563c5bf17302e4376cbd2\"><span class=\"ez-toc-section\" id=\"Purchase-my-exclusive-diving-ebooks\"><\/span>Purchase my exclusive diving ebooks!<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/233191\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg\" alt=\"Gas Management For Scuba Divers Book\" class=\"wp-image-26264\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/233171\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-652x1024.jpg\" alt=\"Become A Shearwater Power User Book\" class=\"wp-image-26382\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-978x1536.jpg 978w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-95x150.jpg 95w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook.jpg 1200w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/111242\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-652x1024.jpg\" alt=\"\" class=\"wp-image-26656\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/262907\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-652x1024.jpg\" alt=\"A Comprehensive Guide to Backplate &amp; Wing BCDs\" class=\"wp-image-26808\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/260377\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-652x1024.jpg\" alt=\"Diving Psychology The Path to Proficiency: Mental Strategies for Scuba Divers (eBook)\" class=\"wp-image-26633\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n<p id=\"rop\"><small>Originally posted 2018-03-07 23:56:22. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>A comprehensive &#8216;how to&#8217; guide to pony cylinder benefits, selection, gas planning and usage. Everything you need to know about pony cylinders.<\/p>\n","protected":false},"author":2,"featured_media":18680,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[880],"tags":[1292,1291,1290],"class_list":["post-18639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scuba-diving_equipment","tag-pony-bottle","tag-pony-cylinder","tag-pony-cylinders-for-scuba-diving"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pony Cylinder: A Complete Guide<\/title>\n<meta name=\"description\" content=\"How to use a pony cylinder for scuba diving. 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