buoyancy

excited to learn more about scuba. I was certified in the last 6 months and have only done a few dives (live far away from dive sites). I already had a taste of equipment malfunction as my LPI orang started leaking 10 minutes into my 3rd post certification dive. I am looking for tips/hints on...

interesting and noteworthy is the weight difference of the filled gases depending on the mixture. For example, a stage filled to 200 bar with oxygen weighs almost 1.5 kg more than a stage with TX18 / 45. In general, a comparison of the gas weights is already fascinating: 80 cuft stage (200 bar...

Hello, Can anyone tell me the precise weight of an 11-liter aluminum tank at 200 bar and 50 bar? I saw someone on quora posted images of the scales reading for such a tank with 3000 psi and 1000 psi. 3000 was around 17.7 kg and 1000 psi was around 16.2 kg. The reason I'm asking this is...

The Optimal Buoyancy Computer A tool to help nail buoyancy and improve safety, before you splash 1) How much lead should I carry with my new wetsuit? 2) How big a wing should I buy? 3) Will my BCD support my lead, both at the surface and when my wetsuit is compressed at depth? 4) Will my BCD...

Boston Sea Rovers Date: Sunday, March 10, 2019 Room: Essex Time: 9:00 AM - 2:00 PM Presenter: Ed Hayes & Gary Woods Sponsor: Evolution Scuba, llc. Fee: $80.00 portion of fee to be donated to American Breast Cancer Assc. Description: Have you ever wanted more control of your diving? Have you...

Hey Folks, I'm looking for some feedback. I dive in British Columbia Canada most of the time, and it's cold here so I have a lot of exposure protection. I wear a full 7mm wetsuit, with a 7mm shortie overtop. Keeps me nice and warm. Typically I wear about 40lbs of led. 14 pounds on my weight...

Hi all, I've been reading old threads about buoyancy calculation, and found the spreadsheet that someone made, which is supposed to be easy to use, but I'm positively confused and negatively flummoxed. How do I find the volume and weight of my BP/W system? I've got a Hog 32lb 360 Bungee Wing...

Perhaps the best propulsion (swimming) technique in Scuba Diving is the Frog Kick. Compared to the Flutter Kick, the Frog Kick is more efficient. It is a “kick and glide” motion that conserves energy while delivering a powerful thrust to propel you forward. It is also very effective. Notice...

Back to basics sounds easy doesn’t it? Having plenty of dives, being current, many technical, on open and closed circuit, you’d think GUE fundamentals would be fairly easy and just polish off what you probably think is a reasonable diver to begin with……………….I wish! “Back to basics” is true...

When you’re out diving with a group, sometimes you immediately notice a few divers looking really cool. It’s certainly not their wetsuit or gear (probably faded and worn down) :). But it’s how they are in the water. They’re not vertical like standing, they’re not kneeling in the sand, they’re...

I have a Sopras Sub/Tek Compact Lite travel BC. It's a BP/W style, though with a soft, light backplate. It has trim weight pockets on both sides of the cam band. Two issues... 1. Initially, I tried to see if there was the face-forward issue on the surface and indeed, there was. If I...

This is a video of my PADI AOW student learning how to deploy a DSMB in strong current conditions while maintaining position (vs drifting). I thought I'd share this with the community to help new divers learn this essential skill. The video includes a step-by-step "how to" of the skill...

I have no problem with "basic" buoyancy, but I get amazed at some videos demonstrating things like kicking techniques. I feel like I have a difference of three feet in depth between depths. It may not bee that much, but I know I have had about two feet on difference based upon drift diving in...

I am having real difficulty maintaining buoyancy for my lower body and it's coming in the way of my being able to swim well or tread water. I seem to sink in water and it makes treading extremely difficult and tiring. Do buoyancy swim shorts help in such cases, and are buoyancy swim shorts...

Hi all, newly minted OW diver here, took the chance to ingrain all the basic skills and tried some other more advanced skills in the pool after my certification. Had success in trying out frog kicks, back kicks, helicopter turns, and holding my position relatively still in the water, but was...

(Happy dad post. You've been warned. Nothing technical inside the post.) Spent an hour in the dive shop pool last night with my youngest son. He doesn't, or didn't, necessarily see the need to get too geeky about his diving. But, he is interested in maximizing his dive time. I've been...

DDT Vlog#18 - Too Much Weight? For sure a topic that has been well-covered on the net...my take on why beginning divers often choose to be negatively buoyant...as a result of risk triage/aversion...the lesser of two weevils There's lot of talk on the net about divers that are apparently too...

I know some/many of you may have seen this type of talk/demo before in your training...but this is a vid I made this year for our divers to reinforce proper trim training for open water/advanced students...Hope this helps someone! In this video, we explain/demonstrate the how to achieve and...

Hi, I have recently purchased the Hollis Elite II backplate system with the steel back plate and the S38 Bladder. I dive with the Hollis DX-300X drysuit with 260 undergarments and a Faber HP steel 100 tank, Hollis F1 bat fins and the Hollis rock boots(yes I love Hollis gear). I'm 6'2" 285lbs...

UTD Instructor Sasha Karnilovich wins DAN's"Master of Trim" Check out this week highlight - UTD Instructor Sasha Karnilovich won DAN Europe's "Master of Trim competition. Check out the interview with her ... Click Here