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Richard Pyle <deepreef@bi*.bi*.ha*.or*> wrote: > ... Otherwise, with corals and seafans and overhangs and >whatnot, guidelines present a greater hazard than safety tool. Uh, yeah, I'd hate to go diving somewhere that had something nice on the bottom for a change, and then go and trash it. A guideline would be routed from one tie point to the next, though, so you wouldn't be dragging it back and forth across the bottom. The idea is one should be swimming either toward or away from the last tie point, not crossways if there's a chance of the line snagging on things in between. The cave guys run guideline all the time and deal with overhangs and suchforth, although I agree that I'm not sure I'd want to tie off to living coral. I should hasten to add that the normal way of doing things on wrecks here is to carry the deco gas and save the line for popping a hang bag if needed. With the possibility of an anchor pulling loose, running a guideline back to it is a poor bet. >Whenever possible, I like to do that as well. But as the dives start to >get extreme (4 hrs plus deco time), it becomes very impractical to carry >everything we need PLUS a complete backup. The rebreather is everything >we need, but the backup (OC bailout gas supplies) need to be staged >somewhere. I'm considering that if you have hang bottles or whatever, you could call what you're carrying your backup, or vice versa, and not have to carry double yourself as backup. Normally we carry enough deco gas to be able to share if something happens to one team-member's supply. With less carried gas, there are still the options of (1) finding the boat, or waiting for it to come to your lift bag, (2) swapping regs, if it was a reg problem, and (3) doing longer deco on back gas, so it's not like the option list would be too short. -- Anthony DeBoer http://www.onramp.ca/~adb/ adb@he*.re*.or* (here) adb@ge*.co* (work) #include "std.disclaimer"
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