Daylonious
Señor Pantalones
Correct - I'm interested currently in deep air wreck dives - 150-180 and I'll be operating a camera (DSLR rig) no penetration - and this will be carribbean with hopefully good viz, low currents and no obvious entanglement hazards.
It fits here about as well as anywhere else in the tech section and i assume the OP is wreck diver inclined and pentration of a wreck is not required ona wreck dive.
The OP may well get a different response from a cave diver where penetration is by definition going to occur, so I'm willing to assume the Op knows what he is doing and is targeting the audience he wants to target. If he requests it be moved to the general tech section, I am confident any of the mods will be happy to accomodate the request.