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Can You Explain Air Movement in BCDs? #askmark #scuba @ScubaDiverMagazine


Can You Explain Air Movement in BCDs? #askmark #scuba @ScubaDiverMagazine

Don Griz101
@kc7tym9
#askmark could you explain or let divers know how air moves in the bcd. I figured it out after ascending to the surface from 60 feet. Go vertical or point your shoulder. I never thought about it. It was never told about it.

#scuba #scubadiving #scubadiver
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DTT
DTT
8 months ago

glad yo mentioned the pull dump

DTT
DTT
8 months ago

#askmark why on a safety stop you go up to 15-20 ft and just wait 3mins. why can’t you swim around for 3min at 15-20ft and look around. is it better to decompress while not moving. i read that you should be parallel rather than vertical.

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  DTT
8 months ago

You can certainly move around on a stop. It just depends on the dive and the conditions. I’ll often plan to start my safety stop before I reach my exit point for just that reason. If there’s no current I’ll hunt around for trash that I can collect.

It is technically better to be horizontal in the water so that your whole body is at the same ambient pressure and your body is all decompressing at the same rate. If your feet are 1 meter below your dive computer then they’re decompressing at a slightly slower rate…

anon
anon
8 months ago

Missed you on simply scuba when they seemed to go under, was really hoping you were somewhere else on the youtubes and glad i found you again!

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  anon
8 months ago

Yeah, I seem to have jumped ship at the right time…

Scubavery
Scubavery
8 months ago

Interesting video. Which gets me thinking which I am going to ask a question.

john hoeffel
john hoeffel
8 months ago

#askmark
Mark
I got the scuba diving bug and went through open water and advanced training on vacation accumulating 28 dives. Over the last year I have had some medical issues keeping me from diving in the last 250 days. Would you have a suggestion on a liveaboard where I could hire a dive instructor to assist me to regain my proficiency?
Thanks,
John

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  john hoeffel
8 months ago

Most dive guides on liveaboards are usually Instructors and can help you out depending on the itinerary. A liveaboard is a great way to get back into scuba diving. I would recommend however that you visit your local dive centre for a quick refresher as a safer option. Only because once a liveaboard has left harbor you are usually out at sea for the entire week which is a long time if there’s some reason that you can’t dive.

Alessandro Actis Dana
Alessandro Actis Dana
Reply to  john hoeffel
8 months ago

I always suggest to my students, at the end of any courses, to do some local (shallow) dives to refresh before leaving for a diving holiday if they have to stop more than a couple of months from the last dive. It will take the time to review all in a “cheaper and friendly space”, with instructors that speaks your language as mother’s language, and it’s safer also for medical reasons.

Joseph dracula
Joseph dracula
8 months ago

😎👍🇵🇭! Thanks Mark I always enjoy your videos!

Dan Mackenzie
Dan Mackenzie
8 months ago

#askmark
Cheers Mark. Could you possibly do a review of different ditchable weight systems for a BP/W? I currently have the xdeep waist mounted ones on my zen bp/wing, which are great, but looking to see if I can find a way to get something that will mount vertically on the backplate instead, similar to the system the Apeks Outlaw, and still be ditchable if needed.

My issue with the xdeep ones is when getting back into a RIB I tend to want one hand to hang onto the RIB, and one hand to remove and pass up my weights, but it’s a two handed job with the xdeep pouches to unclip the buckle, and then pull out the fabric pouch without dropping it so I’m currently relying on some weird contortions, or a buddy holding me to the boat. The surelock system by Aqualung/Apeks looks promising but I struggled to find details online showing how it might work with a BP/W, especially in that “vertical configuration”.

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Dan Mackenzie
8 months ago

Yeah, pinch clips are more secure but do require two hands to undo and pass them up. You could use a Jon Line to secure yourself to the RIB. Might be a cheaper option. Either clip yourself or the weight pouches to the Jon Line so if you do drop the they don’t go very far.

I think the vertical ones from AquaLung all require the ModLock fitting. DIRZone and Dive Rite make a vertical weight pocket system that might work for you.

Dan Mackenzie
Dan Mackenzie
Reply to  Dan Mackenzie
8 months ago

@Scuba Diver Magazine Thanks Mark, will take a look at them!

Anirudh Poddar
Anirudh Poddar
8 months ago

Hi Mark, really appreciate the solid advice in your videos. Always something new to learn!

I recently decided to take a plunge into the technical diving world and have started building up my kit. My local dive shop suggested Mares XR products including the silver singles BP&W set as well as the Mares 28XR HR in a long hose config. While in the past you have reviewed the singles kit (different versions), I am unable to find any reviews on the reg set on YouTube or otherwise. Any help would be super appreciated. Thanks! #askmark

Scuba Diver Magazine
Scuba Diver Magazine
Reply to  Anirudh Poddar
8 months ago

Yeah, I’ve used the HR 2nd stage before and it’s a nice light 2nd stage with a good breathe. Mares have always made good regulators and I’ve used them for years now.
The 28 is a large 1st stage but a good design. They’re very similar to my primary regulators right now and I’d be more than happy to dive them.

Anirudh Poddar
Anirudh Poddar
Reply to  Anirudh Poddar
8 months ago

@Scuba Diver Magazine thank you!

Ivory Johnson
Ivory Johnson
8 months ago

Thanks Mark….. each BC vents differently best to practice in a pool. That way you know how to twist around to get it to vent. Thumbnail looks fine

Don Griz101
Don Griz101
8 months ago

Thanks Mark.

0-10 Volts
0-10 Volts
8 months ago

Nice one Mark.

Hugh Idiyit
Hugh Idiyit
8 months ago

The thumbnail is a bit irritating 😉

Leopold Bloom
Leopold Bloom
8 months ago

Good information, as always. Just a hint: the thumbnail says water, not air, movement.

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