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	To expand on Anthoney's comments;

	Why hang the bottle start with?

	Personally I'm all for taking all the gas for a dive with me,
but I don't do the sort of extreme things that the big boys on here do,
so single 12l tanks have done me very well so far. I still like to use
this process though:

	The divers ascend to their first stop.

	*If* they are on the line and need no gas, no worries.

	*If* they either need more gas *or* are off the line, they pop
up a Delayed SMB. 

	The boat then drops a bottle on a buoy, with 15m of line and
hooks every 3m. If on the line, use it. If in open water, that's your
hang.

	Now, obviously this only works if your boat crew aren't complete
dicks (extend rule number 1, don't go within 100 yards of water in the
presence of the S people) and there aren't too many of you. A six diver
boat with no more than two pairs in at a time can use this well. 

	Rig one set of buoy and bottle per 2-3 pairs then.

	Only trouble is that in heavy seas your SMB ducks under and you
stay still, but the big buoy with the bottle on (Steel or weighted Al,
BTW) belts up and down like a mad thing.

	Jason

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