Quote: (Originally Posted by
RAL)
Just thought it might be an option if it would fit in the frame, the bouyancy & weight looked like it might be a good option. Those 27 steels looked huge to me. They are the biggest tanks I have seen on any rebreather other than the Klingon warship.
I see dive rite express is already offering the Cat 20s as an option for the Optima so it may be a good choice?
Ral
There are times when larger ONBOARD cylinders are warranted.. WHen I am doing some really big dives I use 7.5l lp steels that I'll bump up to 200bar or so.. A small 2l or 3l cylinder does not have enough gas to cover the loop if flushes are needed and the wing.. (in a DS I also use independent inflation)
a 150m dive can easily take up more than 1/3 the cylinder just making up the initial loop volume.. add this your wing and you may not have much to spare...
With the larger onboard cylinders the sling tanks are really for emergency use, not required gas for the dive...