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Doubles - Do you like them big or small?
lerpy - 5/13/2013 2:31 PM
Category: Equipment
Replies: 2

Thinking about getting into doubles for possible further training into the wreak/cave diving world. Looking for advice for those using doubles what size is best. Going based on I am 6’2", big guy so can carry some weight, but but don’t want to become a beast of burden. I have looked and see the spectrum is pretty much LP95 to 130’s and there seem to be some odd sizes that are used by some. I currently use a single 150.
LatitudeAdjustment - 5/14/2013 5:39 AM
You need to know your SAC (Surface Air Consumption) for the diving you’ll be doing, how deep and how long to pick a size.

If you’re cave diving with a scooter your SAC will be lower but the rule of 1/3’s figures your scooter died and you are swimming out.

If you are going to be entering wrecks you sure don’t want twin 150’s. On wrecks it’s common to sling tanks and leave what you’ll need for the accent and deco outside, just remember where!

This is why I use a BP&W, I can config a 72 for a beach dive or twin independant 80’s and sling bottles for something deeper.
DiveBuddyChgo - 5/15/2013 2:33 AM
OMS Steel LP 85’s Bouancy is the same empty/full. A fill of 3,000psi will give you 105cf gas ea. tank. Swap out for DIN HP valves and get HP fills. The same tank in Europe is rated so much higher for pressure. I’ll let you do the math on volume/pressure.