Scuba/Altitude

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Depth Table

Feet10002000300040005000600070008000900010000
1010111112121213131415
2021212223242526272829
3031323335363739404244
4041434546485052545658
5052545658606265677073
6062646769727578818487
70727578818487919498102
808386899296100103108112116
909397100104108112116121126131
100103107111116120124129134140145
110114118122127132137142148153160
120124129134139144149155161167174
130135140145150156162168175181189

Ascent Rate At Altitude

30 feet per minute at all altitudes above sea level, verses 60 feet per minute at sea level

How To Find Your Pressure Group After Arriving At Altitude

If your starting altitude is less than dive altitude then add 2 pressure groups for each 1000 feet of altitude you increase.

If starting at altitudes of 4000 or higher, add 4 pressure groups for each 1000 feet of altitude increase.

If diving at an altitude of 8000 feet or greater wait 6 hours before diving.

Repetitive Diving

When diving at altitude it is recommended to limit your diving to no more than 2 dives per day.

Safety Stop Requirement

A safety stop is required for all dives at altitude. The depth of the safety stop changes with altitude. Refer to the above chart for correct depth.

Depth Gauges

Your depth gauge or computer must be adjusted for altitude diving. If you gauge cannot be adjusted then use the following formula to convert the closed bourdon tube gauge to get actual depth.

Depth Shown in feet + 1 foot + (1 foot per 1000 feet above sea level) = Actual depth

Source

http://utahscubadiver.com/wp-content/uploads/2012/04/AltitudeTables.pdf