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I'm still curious about that one too. Last I checked in CCR you have 2 options for bailout. Individual or team. In team bailout you pass the bottle off, in individual bailout, you have no need for a hose that long..... 5' might be necessary if you're a big guy and want to wrap it around your neck and still have it go down, but if you have a turret first stage a 40" with a 90* adapter is plenty to go from sidemount position behind your shoulder, to in front of your shoulder, around your neck, with enough room to look all the way to the left. Even without a turret, you are going to be mostly there. You can find 48" hoses that are fine as well and the nice thing with those is they still stay in the top hose retainer so you can stow them easily. 7' is too long to stow with one loop, 5' is pushing it, especially on smaller bailout tanks. 48" works pretty well and allows you to have a hose retainer at the top and bottom of the tank. On restow, the top band still has the hose inside of it, so you can push it down through there, swing the bottle forward and tuck the loop into the bottom. 40" works for most normal sized people, but I'm pretty big, so I prefer the slightly longer hoses.
Again, I'm not a rebreather diver or a cave diver, so I speak only from having observed hundreds of the same doing wreck dives in OW, but many of the folks who dive with me have a BOV and their offboard bailout plumbed into a gas block into their BOV. I can understand someone not wanting the weight of a BOV in their mouth, so many use an actual O/C bailout as Tammy is describing. I've never seen any sort of rebreather diver wrap their long hose. I've never seen a long hose on a rebreather bailout, so that's why I've never seen it wrapped.