A lot of good points already made. One of my concerns with this weighting philosophy is what if you have to donate gas to a teammate? Likely on CCR? Not very, but a teammate suffering a CO2 hit will likely need all of the gas in the cave….
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You're right, I fudged up the numbers. It should be closer to 3.5#: -0.7 on start and 2.8 at close to 500 PSI. How did you get 4.8lbs?@mr_v you are using the mass of the gas not the inherent buoyancy of the tank. 4.8lbs at 500psi not 2.8.
Biggest concern? What if you bailed out for reasons other than a rebreather malfunction? Now you've flooded a good unit.The most concerning thing for me is how much they are relying on flooding a Sidewinder which has very little floodable volume in it, essentially it's barely more than the loop hoses themselves and to flood the inhale hose is going to take some acrobatics. The sorb is put directly in the canisters so there is not a lot of airspace inside the canisters themselves.
You're right, I fudged up the numbers. It should be closer to 3.5#: -0.7 on start and 2.8 at close to 500 PSI. How did you get 4.8lbs?
Biggest concern? What if you bailed out for reasons other than a rebreather malfunction? Now you've flooded a good unit.
You're right, I fudged up the numbers. It should be closer to 3.5#: -0.7 on start and 2.8 at close to 500 PSI. How did you get 4.8lbs?
Biggest concern? What if you bailed out for reasons other than a rebreather malfunction? Now you've flooded a good unit.
Why would you remove your unit? Partially removing your unit potentially has its place in extreme exploration scenarios but...my concern is buoyancy if you have take the unit off - im yet to experiment but i alway wonder how much weight id need on me to not get pinned to an overhead
Why would you remove your unit? Partially removing your unit potentially has its place in extreme exploration scenarios but...
There have been numerous fatalities from exactly this. The fatality in Ginnie springs and the double fatality in Eagle's Nest are both directly attributable to divers removing their units. The former flooded due to burping O2, the latter led to one diver being crazy buoyant which ended up killing him and his buddy as they attempted a BO exit together.
There are basically zero established protocols for unit removals so beware.
That's a "do not do" from the first step. Simply avoid scenarios where you can recklessly put yourself and others in danger. There is really no reason to remove your unit.thinking mostly from situation where you got entangled in wreck ( net, wires etc) than a tight cave, where you couldnt free yourself and your buddy is unable to assist (or if your solo)
you response is a tad patronising- lets start with removing the word 'recklessly' nobody deliberately puts themselves in a life or death situation but sometimes things go wrong and it happens, and if it does you need a plan and that plan as a last resort may involve removing a unit.That's a "do not do" from the first step. Simply avoid scenarios where you can recklessly put yourself and others in danger. There is really no reason to remove your unit.