{"id":1214,"date":"2022-11-11T23:39:49","date_gmt":"2022-11-11T15:39:49","guid":{"rendered":"http:\/\/scubatechphilippines.com\/scuba_blog\/?p=1214"},"modified":"2022-11-11T23:39:49","modified_gmt":"2022-11-11T15:39:49","slug":"deep-diving-below-agency-depth-limits","status":"publish","type":"post","link":"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/","title":{"rendered":"Scuba Q&#038;A: Deep Diving Below Recreational Agency Depth Limits"},"content":{"rendered":"<h1 style=\"text-align: center;\">Scuba Q&amp;A<\/h1>\n<p><strong>Question: \u00a0 I was taught that &#8220;recreational divers plan all dives to be no stop dives&#8221; and also that most agencies consider 40m \/130 feet as the maximum depth for recreational deep diving. \u00a0That seems inconsistent when my dive computer allows me to dive\u00a0below 40m\/130 feet and still stay inside\u00a0no-stop<\/strong> <strong>limits.<\/strong><\/p>\n<p><strong>Why shouldn&#8217;t I dive as deep as my computer allows me, as long as my dive is no stop? <\/strong>[no_toc]<\/p>\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' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Andys-Answer\" >Andy&#8217;s Answer<\/a><\/li><\/ul><\/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\/deep-diving-below-agency-depth-limits\/#Narcosis\" >Narcosis<\/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\/deep-diving-below-agency-depth-limits\/#Time-to-Surface\" >Time to Surface<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Gas-Consumption\" >Gas Consumption<\/a><\/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\/deep-diving-below-agency-depth-limits\/#Equipment-Functionality\" >Equipment Functionality<\/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\/deep-diving-below-agency-depth-limits\/#Bottom-Time\" >Bottom Time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Decompression-Sickness\" >Decompression Sickness<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Oxygen-Toxicity\" >Oxygen Toxicity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Carbon-Dioxide-CO2\" >Carbon Dioxide (CO2)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Accumulation-of-Factors\" >Accumulation of Factors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#Accident-Chain-Risk-Tolerance\" >Accident Chain &amp; Risk Tolerance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/deep-diving-below-agency-depth-limits\/#The-Need-for-Recreational-Scuba-Deep-Diving-Limits\" >The Need for Recreational Scuba Deep Diving Limits<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Andys-Answer\"><\/span><img decoding=\"async\" class=\"alignleft size-thumbnail wp-image-6774\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/technical-diving-subic-bay-philippines-1-150x150.jpg\" alt=\"andy davis technical diving\" width=\"150\" height=\"150\" \/>Andy&#8217;s Answer:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>There are other criteria which contribute to most agencies setting 130ft as a maximum depth limit for recreational divers with deep diving training. \u00a0Narcosis management is prime among them &#8211; and has an impact on all the other criteria.<\/p>\n<p>Without<a title=\"Technical versus Recreational Diving\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/technical-vs-recreational-scuba-diving-why-the-need-for-rules-boundaries-and-limitations\/\" target=\"_blank\" rel=\"noopener noreferrer\"> technical diving<\/a> training, recreational divers are not expected, by default, to possess certain key deep diving skill and knowledge competencies. Neither are they expected or required, to have a minimum level of equipment support or redundancy (beyond the existence of a buddy) to mitigate risks that increase with depth.<\/p>\n<p>The criteria that need to be considered, in relation to risks when deep diving, are:<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Narcosis\"><\/span><strong>Narcosis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nitrogen\/Inert Gas Narcosis typically starts to degrade performance around 30m\/100ft. \u00a0The effects become much stronger for every few meters beyond that. \u00a0For many divers, especially those without ingrained functional diving skills, the effects will become debilitating\u00a0or at the least, significantly reduce performance, beyond 40m\/130ft. <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/nitrogen-narcosis-sedation-consciousness\/\">Symptoms of narcosis<\/a> may not be present, but a diver will still be impaired. \u00a0The typical <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/gas-density-diving-research-risks-recommendations\/\">CO2 retention<\/a> associated with <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/stress-management-and-panic-response-in-scuba-diving-training\/\" target=\"_blank\" rel=\"noopener noreferrer\">stressful<\/a> incidents (exertion and\/or elevated respiration) can also cause a rapid spike in narcosis and\u00a0catastrophically\u00a0degrade mental performance when it is most needed to save your life.<\/p>\n<div class=\"scuba-b4-h2-2\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-3173998876\"><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><span class=\"ez-toc-section\" id=\"Time-to-Surface\"><\/span><strong>Time to Surface<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you consider 40m\/130ft in respect of &#8216;time-to-the-surface&#8217; then (depending on your training agency) you have 2-4 minutes of ascent travel to reach safety should a problem arise. \u00a0That is a long time to potentially have no air to breath &#8211; and beyond the capabilities of many people. In contrast, 18m\/60ft (1-2 minute ascent) is easily within the capabilities of most people to achieve on a single breath\/exhalation. In essence, the &#8216;last fail-safe&#8217; of a Controlled Emergency Swimming Ascent can be denied to the diver.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Gas-Consumption\"><\/span><strong>Gas Consumption<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Whilst your respiration may remain constant, there is a direct relationship between the volume of gas consumed and the ambient pressure it is breathed at. \u00a0Deep diving entails highly elevated consumption of gas supplies, requiring greater situational awareness and more diligent monitoring of gauges. The duration of deep dives will be significantly limited by the gas supply available to the diver. \u00a0In addition, the impact of stress on respiration rates must be acknowledged. \u00a0If something goes wrong when deep diving, then your gas consumption can increase by a factor of ten and\/or the diver may have to share air with their buddy.<\/p>\n<p>Recreational divers rarely\u00a0receive the\u00a0training necessary to calculate their regular, or elevated\/stressed, <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-planning-management-divers\/\">air consumption<\/a> at a given depth and for the following ascent. Nor are they routinely educated to calculate the relationship between that air consumption and the supply of gas they will require for their planned\u00a0dive<em>\u00a0or<\/em>\u00a0to cope with emergency scenarios, especially when sharing air with another diver.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Equipment-Functionality\"><\/span><strong>Equipment Functionality<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The effects of increased ambient pressure and workload dealing with denser gas flow cause more strain on scuba equipment. This can lead to increased risk of equipment failure. \u00a0When coupled with the other factors listed, an equipment failure below 40m\/130ft is significantly more serious that it would be within recreational diving depths. Whilst technical divers are trained to identify such risks and mitigate them through a calculated system of equipment\/gas redundancy and refined emergency procedures, there is very\u00a0little provision of these safeguards within recreational diving course syllabus.<\/p>\n<div class=\"scuba-b4-h2-3\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-3504702173\"><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><span class=\"ez-toc-section\" id=\"Bottom-Time\"><\/span><strong>Bottom Time<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>It is possible to calculate dives beyond 40m\/130ft that still provide an NDL. \u00a0Even the PADI RDP states a 4-minute bottom time at that maximum depth. Whether such times, especially when descent time is considered, remain worthwhile or meaningful is very questionable. \u00a0At the most, the diver will be restricted to a &#8216;<a href=\"http:\/\/www.scubaboard.com\/forums\/content\/454-bounce-dives-what-do-if-you-find-yourself-doing-one.html\" data-cke-saved-href=\"http:\/\/www.scubaboard.com\/forums\/content\/454-bounce-dives-what-do-if-you-find-yourself-doing-one.html\">bounce dive<\/a>&#8216; &#8211; which presents further complications and risks from a physiological\/decompression perspective.<\/p>\n<p>Also, as per gas consumption, the shorter duration of bottom demands a much higher degree of situational awareness and &#8216;gauge vigilance&#8217; from the diver. \u00a0A distraction, or any unforeseen delay, can much more easily lead to the imposition of mandatory (emergency) decompression stops, which a recreational diver is unlikely to be trained or equipped to complete with any pre-determined guarantee of effectiveness.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Decompression-Sickness\"><\/span><strong>Decompression Sickness<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Decompression software used to calculate dive times via tables or dive computers, is not an exact science. At best, it can be considered in respect of &#8216;statistical likelihood&#8217;.\u00a0Adhering to a No-Decompression Limit does not ensure invulnerability to <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/\">DCS<\/a>.\u00a0On a given day, a given diver will be subjected to a greater, or lesser, degree of pre-cursor factors towards DCS.<\/p>\n<p>Likewise, NDLs can only be considered relative to the ascent that follows them. \u00a0Failure to ascend at the correct speed, or perform precautionary &#8216;safety stops&#8217; further increase risk. \u00a0Divers do sometimes get bent within NDLs. \u00a0Needless to say, all agencies encourage divers to plan dives conservatively; allowing a healthy buffer against their NDL. \u00a0Deep diving below 40m\/130ft virtually guarantees that no meaningful buffer can exist. \u00a0You can get &#8216;unlucky&#8217; quicker&#8230; and there is virtually zero tolerance for any <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/technical-diving-experience-paradox\/\">mistakes<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Oxygen-Toxicity\"><\/span><strong>Oxygen Toxicity<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Exposure to high oxygen <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-gas-laws-for-diving-physics\/\">partial pressure<\/a> (PPO2) entails the risk of oxygen toxicity (convulsions, typically leading to drowning). A healthy buffer exists between the recreational deep diving limit of 40m\/130ft and the depth (~56m) where breathing air exceeds the advised maximum PPO2 of 1.4.<\/p>\n<p>However, as with DCS, the risk of an incident is nothing more than statistical likelihood. You are not guaranteed immune from O2 toxicity below PPO2 1.4 &#8211; \u00a0other predisposing physiological factors can have an impact on susceptibility. Few recreational divers are educated to understand those predisposing factors or calculate a prudent max PPO2 in relation to the nature of the dive they are undertaking.<\/p>\n<div class=\"scuba-b4-h2-4\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-3729928080\"><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><span class=\"ez-toc-section\" id=\"Carbon-Dioxide-CO2\"><\/span><strong>Carbon Dioxide (CO2)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Carbon Dioxide plays a key role in many of the factors already listed. \u00a0The retention of CO2 is a contributing factor to narcosis and oxygen toxicity risk. CO2 levels in the lungs are fundamental to respiration control &#8211; the degradation of which is a major catalyst to <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/stress-management-and-panic-response-in-scuba-diving-training\/\" target=\"_blank\" rel=\"noopener noreferrer\">stress and uncontrolled panic<\/a>. CO2 retention is increasingly likely as depth increases, due to the density of gas breathed and consequent workload on the lungs. This especially true when combined with exertion, narcosis symptoms, underlying stress and\/or poor regulator performance. \u00a0When deep diving, CO2 retention becomes a major hazard for divers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Accumulation-of-Factors\"><\/span>Accumulation of Factors<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In my opinion, any single one of these factors is sufficient reason to not venture below 40m\/130ft, without undertaking the technical level training necessary to understand and mitigate the relevant deep diving risks factors.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Accident-Chain-Risk-Tolerance\"><\/span>Accident Chain &amp; Risk Tolerance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When further considering the implicit relationship between many of these risk factors, it necessary to accept a high likelihood that multiple issues will manifest together, one being a result of the other. \u00a0The &#8216;accident chain&#8217; is stronger and more difficult to resolve when deep diving.<\/p>\n<p>When the &#8216;tolerance&#8217; for a single\u00a0innocuous incident to devolve into serious life-threatening scenario is very small, it must be countered by a sufficiently robust system of training and equipment. \u00a0Such a system does not exist within &#8216;recreational&#8217; diving syllabus.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The-Need-for-Recreational-Scuba-Deep-Diving-Limits\"><\/span>The Need for Recreational Scuba Deep Diving Limits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>As you can see, there are many factors that need to be considered when deep diving. \u00a0Scuba agencies set limits on recreational deep diving in recognition of those risk factors and how they relate to the training provided to divers on recreational level scuba training courses.<\/p>\n<p>When a scuba diver calculates their own personal deep diving limit, in general, or for a specific dive, they should be aware of all the risk factors that apply to their safety.. and the relationship of those risks to the training and capabilities they possess as a result of previous training and experience.<\/p>\n<p><a title=\"What is technical diving?\" href=\"http:\/\/scubatechphilippines.com\/technical-diving-overview\/\" target=\"_blank\" rel=\"noopener noreferrer\">Technical diving training<\/a> exists to provide a safe alternative for divers who wish to venture below recreational deep diving limits. The theory, protocols and equipment approaches presented on <a title=\"Technical Diving Courses Overview\" href=\"http:\/\/scubatechphilippines.com\/technical-diving-overview\/\" target=\"_blank\" rel=\"noopener noreferrer\">tech courses<\/a> ensure that divers can understand, and are reasonably able to mitigate, all of the risks that exist when deep diving. This approach also permits more meaningful and satisfying dives, as scuba divers are not limited to excessively brief &#8216;no-stop&#8217; times, or insufficient gas supplies at deeper depths.<\/p>\n<hr \/>\n<p><strong>About the Author<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignleft wp-image-5561\" title=\"andy davis technical diving philippines\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2016\/09\/Cartoon-Andy-900x900-1-150x150.png\" alt=\"andy davis technical diving philippines\" width=\"131\" height=\"180\" \/><\/p>\n<p>Andy Davis is a RAID, 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 advanced <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/sidemount-diving-techniques\/\">sidemount<\/a>, trimix and wreck exploration diving courses across South East Asia.\u00a0 Currently residing in \u2018wreck diving heaven\u2019 at Subic Bay, Philippines, he has amassed more than 9000 open circuit and CCR dives over 27 years of diving across the globe.<\/p>\n<p>Andy has published many magazine articles on technical diving, has written course materials for dive training agency syllabus, tests and reviews diving gear for major manufacturers and consults with the Philippines Underwater Archaeology Society.<\/p>\n<p>He is currently writing a series of books to be published on advanced diving topics. 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<p><img decoding=\"async\" class=\"wp-image-6769 aligncenter\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/RAID-Deco-50-Banner-Website-Size.jpg\" alt=\"\" width=\"640\" height=\"320\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/RAID-Deco-50-Banner-Website-Size.jpg 980w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/RAID-Deco-50-Banner-Website-Size-300x150.jpg 300w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/RAID-Deco-50-Banner-Website-Size-768x384.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p id=\"rop\"><small>Originally posted 2018-03-07 23:56:52. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Scuba Q&amp;A Question: \u00a0 I was taught that &#8220;recreational divers plan all dives to be no stop dives&#8221; and also that most agencies consider 40m \/130 feet as the maximum depth for recreational deep diving. \u00a0That seems inconsistent when my dive computer allows me to dive\u00a0below 40m\/130 feet and still stay inside\u00a0no-stop limits. Why shouldn&#8217;t [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":15128,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[307,313,305,309,306,67,312,194,308,311,277,310],"class_list":["post-1214","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scuba-diving-faq-advice-tips-information","tag-co2-retention-when-scuba-diving","tag-decompression-sickness","tag-deep-diving","tag-dive-safety","tag-inert-gas-narcosis-diving","tag-scuba-diving-depth","tag-scuba-diving-gas-consumption","tag-scuba-diving-limits","tag-scuba-diving-training-agencies","tag-scuba-equipment","tag-technical-diving","tag-technical-diving-oxygen-toxicity"],"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>SCUBA Q&amp;A: Deep Diving Below Recreational Scuba Depth Limits?<\/title>\n<meta name=\"description\" content=\"Dive computers allow short no-decompression dives when deep diving below 40m\/130feet. 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