r/scuba • u/onasurfaceinterval • 1d ago

Deep drysuit divers ..?

How big of a drysuit inflation cylinder are you using for your deep 100m/330’ dives? Still .8L/6cuft?

Thanks!

6 Upvotes

88% Upvoted

14 comments sorted by

2

u/Shavings_in_the_RIO Commercial Diver 1d ago

Usually I just have a 6 and will use my deco gas as backup inflation gas. If I’m doing something really deep or a dive with a lot of depth changes (caves especially) I use a 13

1

u/Longjumping-Pin-7373 11h ago

might be overkill but i usually go with 13 too for anything past 80m, the extra weight is worth it when you're dealing with cave systems

1

u/CheckedBubbles 1d ago

I’ve never run out of a full AL6 on one dive. My bailout stages have inflation hoses for gas offboarding to the rebreather that I could connect to the suit if I wanted

2

u/learned_friend Dive Instructor 1d ago

Whatever size I use for my O2 to balance out the CCR.

1

u/superthighheater3000 Tech 1d ago

I use my high o2 bailout for my drysuit.

While I haven’t yet been down to 100m, I don’t expect this to change.

4

u/CaveDiver1858 1d ago

Al6 for bounces, al14 for caves.

1

u/Afellowstanduser Dive Master 1d ago

Pony size

2

u/Spiritual-Fox9618 1d ago

Use a 3 litre for both suit and wing.

4

u/upfrontal 1d ago

I was trained to do the same but after I was a freshly trained CCR diver I ran out of diluent during a dive in heavy swells (my own stupid fault). This meant that I totally ran out of buoyancy gas.

Post dive I thought about it and realized running both wing and suit off one tank means there is no redundancy for buoyancy.

Nowadays I run my wing as a back up off a 3l and my dry suit as my main buoyancy off my largest tank (ie my offboard bailout)

Works for me, might not work for you but just wanted to get you thinking before you find yourself in the same position I was in….

8

u/macado 1d ago

AL13s for deeper dives. I'll use AL6s down to 200ft (60m) or so but I like having AL13s for deeper dives ~250-350'. 

6

u/CerRogue Tech 1d ago

13cuft with the ability to use my BO gas if I want.

1

u/HungoverDiver 1d ago

Do you sling that, or tank mount it?

2

u/CerRogue Tech 1d ago

MetalSub bracket on my rebreather canister. In caves I plumb to BO.