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In a couple weeks, I'll be heading up to the Rockies to dive some glacier
lakes.  I've never done any altitude diving before.

I hope we can dispell some of the possible myths out there and that I can
learn something in the process.

Here are my questions:

1) I know how wrong dive tables are, and I've thrown out my USN long ago in
favour of planning my dives using software.  Is there some general rule of
thumb I should follow instead of plugging my altitude into the software?

ie add 5ft to your depth for every 2000ft above sea level - or something
similar

2) I've heard that once arriving to altitude, it is best to spend 12-24 hrs
at that altitude before diving, so your body gets acclimatised.  I suspect
that this is crap, but I'd just like to confirm.

3) At what height should I start altering my profile.

thanks a lot.  I'm looking more for general rules than for an answer like
just plug in into decoplan.

Steve

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