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Category: Scuba Diving Q and A


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Why do tech divers use two computers? Technical diving requires redundancy of safety-critical equipment. If something fails, you still have to complete the planned decompression to surface safely. Being able to track time and depth for a decompression ascent is obviously critical to that requirement. It can be done (or backed up) with a written […]

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Originally posted 2019-02-24 15:33:53. Scuba Q and A: Why Do Divers Use Nitrox? Question: What are the advantages of Nitrox diving?   Answer:  There are several advantages to using nitrox as a scuba diving gas. Only the first benefit is commonly taught at novice level diving. Reduced Inert-Gas Absorption This is the primary, sometimes only, […]

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Originally posted 2019-02-24 14:20:37. Scuba Q and A: Why Do Decompression Divers Use Nitrox? Q. Why do decompression divers need to use nitrox in the shallower part of their dive? Answer: A diver absorbs or releases inert gas based on the positive or negative partial pressure differential of those gases in their breathing mix and […]

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Originally posted 2019-02-22 18:41:19. Scuba Q and A: How Can I Overcome My Fear of Mask Removal? Q. How do I get over my fear of removing my mask to get my scuba certification? Answer: Firstly, you aren’t performing skills in your class simply to be gifted a plastic card. Those skills are trained to […]

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Originally posted 2019-02-22 12:41:03. Scuba Q and A: Steel or Aluminium Cylinders Q. Do professional divers prefer aluminium or steel scuba tanks, or is it a purely personal choice? Answer: The choice of scuba cylinder material is ultimately a personal factor, although there are informed logics that can help determine that choice. The biggest influencing […]

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Originally posted 2019-02-22 12:37:49. Scuba Q and A: How Dangerous Is Technical Diving? Q. How dangerous is technical diving? Answer: The aim of technical diving is to mitigate foreseeable risks through more advanced training, suitable equipment, increased diver proficiency, a higher level of knowledge and the development of a risk-averse, cautious, mindset. In short, the […]

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Originally posted 2019-02-22 12:34:35. Scuba Q and A: Why Do Deep Divers Use Helium? Q. Why is helium preferred over nitrogen for diluting oxygen during deep sea diving? Answer: There are three reasons why helium becomes a necessary addition to breathing gas as depth increases: Oxygen Toxicity Oxygen is known to cause central nervous system […]

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Originally posted 2019-02-22 12:30:21. Scuba Q and A: Do You Need A Diving Certification? Q. Does someone need a certification for scuba diving? Answer: You need to be aware of certain specific risks and proficient in the physical protocols to effectively mitigate them. The most assured way to confirm that you have the right knowledge […]

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Originally posted 2019-02-22 12:25:30. Scuba Q and A: How Can I Use Less Air While Scuba Diving? Q. How do you use less air while scuba diving? Answer: Some divers, especially low-quality instructors, usually rush to suggest all manner of easy quick-fix solutions, that don’t really work. The truth is, your respiration demand is driven […]

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Originally posted 2019-02-22 12:20:48. Scuba Q and A: Why Does Diving Make Me Feel Tired? Q. Why does scuba diving make you tired? Answer:  It doesn’t – or at least, it shouldn’t. If you find yourself inexplicably fatigued, or sleepy after diving then it can be due to ‘decompression stress’. Don’t dismiss these sensations as […]

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Originally posted 2019-02-22 12:15:53. Scuba Q and A: What Is Your Reason For Technical Diving? Q. What is your reason for doing technical diving? Answer:  I look at it as “tools in my tool box“. I need to possess the right tools to allow me to achieve my diving objectives. These tools include the training, […]

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Originally posted 2019-02-22 12:12:32. Scuba Q and A: How Deep Can You Dive Using Air? Q. How deep can someone scuba dive using normal air? Answer:  There are a number of factors that determine the Maximum Operating Depth (MOD) of any gas mixture. These include: Inert-Gas Narcosis Inert gas narcosis using air begins to become […]

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Originally posted 2019-02-22 11:56:32. Scuba Q and A: What’s The Best Advice For Someone Starting Open Water Diver Qualification? Q. What advice do experienced divers have for someone starting their PADI Open Water certification? Answer: Practice, practice, practice. Do not accept the bare minimum timescale for graduation if you are not very confident and competent […]

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Originally posted 2019-02-22 11:49:08. Scuba Q and A: How Can I Make My Air Last Longer When Diving? Q. I normally finish my air before everyone else. How can I conserve air when I dive? Answer: There are several factors that dictate air consumption. Let’s examine them: Lung Volume This is something you cannot change. […]

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Originally posted 2018-03-07 23:56:52. Scuba Q and A Question:   I was taught that “recreational divers plan all dives to be no stop dives” and also that most agencies consider 40m /130 feet as the maximum depth for recreational deep diving.  That seems inconsistent when my dive computer allows me to dive below 40m/130 feet and […]

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Originally posted 2018-03-07 23:54:39. Scuba Q and A: QUESTION:  I am a recreational diver and I dive mostly with my husband. Our relationship issues (bickering) caused me stress.  Is this a factor I should consider when scuba diving? Andy’s Answer: I know of at least one diving fatality that could otherwise have been avoided if […]

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Originally posted 2018-03-07 23:54:30. Scuba Q and A QUESTION: I need some advice; I have been told to use your BCD for buoyancy control instead of your dry suit. I have also been told the opposite.  Which option is best, or does it really matter? Andy’s Answer: PADI teaches drysuit primary buoyancy on their recreational specialty. […]

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Originally posted 2017-10-13 14:50:43. Scuba Q and A: Question:   On my Open Water course, I was taught to drop my weight belt in an emergency. What situations would merit dropping my weights? I am naturally concerned that dropping weights will lead to a rapid ascent to the surface.   Andy’s Answer: There is one primary […]

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Originally posted 2019-08-07 21:06:39. Question: What is the difference between a Dive Guide and a Divemaster?  Both RSTC and ISO describe Open Water qualification as an “autonomous level” qualification. ‘Autonomous’ means that the qualified diver DOES NOT REQUIRE SUPERVISION relative to the level of their qualification. Consequently, it should be appropriate for a “Dive Guide” […]

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Originally posted 2019-08-07 20:37:15. Question: What is the value of doing more training beyond my current level?  Undertaking courses is (should be!) about acquiring new skills, knowledge, improving competencies and increasing proficiency. If someone views courses as merely a means to obtain new plastic cards (“license acquisition mentality”), then the perceived value of training substantially […]

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Originally posted 2019-02-24 16:08:01. Scuba Q and A: How To Ascend When Diving? Q. How should a scuba diver ascend when scuba diving? Answer: Novice scuba divers are taught to ascend very slowly from depth – which is an appropriately simplistic ‘rule’ that helps them avoid a too fast ascent which could otherwise cause decompression […]