if you cannot get nitrox


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Posted by northcoast diver on February 16, 2005 at 15:09:27:

In Reply to: Re: various solutions posted by Eric S on February 16, 2005 at 13:42:44:

If you cannot get nitrox, then you cannot get nitrox. That is still the ages old argument in favor of air diving and deep air diving.

With air as a breathing mix, I would simply recommend keeping your depth shallower than 65 ft. Then, with one-hour surface intervals, and 80 cu ft single tanks each, you can dive as much as you want. See below.

DIVE PLAN #1
Surface interval = 5 day 0 hr 0 min.
Elevation = 0ft
Conservatism = + 3

Dec to 65ft (1) on Air, 50ft/min descent.
Level 65ft 28:42 (30) on Air, 0.62 ppO2, 65ft ead
Asc to 20ft (31) on Air, -30ft/min ascent.
Asc to 15ft (31) on Air, -30ft/min ascent.
Asc to sfc. (32) on Air, -30ft/min ascent.

OTU's this dive: 9
CNS Total: 4.4%

69.0 cu ft Air
69 cu ft TOTAL


DIVE PLAN #2
Surface interval = 0 day 1 hr 0 min.
Elevation = 0ft
Conservatism = + 3

Dec to 65ft (1) on Air, 50ft/min descent.
Level 65ft 28:42 (30) on Air, 0.62 ppO2, 65ft ead
Asc to 20ft (31) on Air, -30ft/min ascent.
Asc to 15ft (31) on Air, -30ft/min ascent.
Asc to sfc. (32) on Air, -30ft/min ascent.

OTU's this dive: 9
CNS Total: 7.1%

69.0 cu ft Air
69 cu ft TOTAL


DIVE PLAN #3
Surface interval = 0 day 1 hr 0 min.
Elevation = 0ft
Conservatism = + 3

Dec to 65ft (1) on Air, 50ft/min descent.
Level 65ft 28:42 (30) on Air, 0.62 ppO2, 65ft ead
Asc to 20ft (31) on Air, -30ft/min ascent.
Asc to 15ft (31) on Air, -30ft/min ascent.
Asc to sfc. (32) on Air, -30ft/min ascent.

OTU's this dive: 9
CNS Total: 8.9%

69.0 cu ft Air
69 cu ft TOTAL


DIVE PLAN #4
Surface interval = 0 day 1 hr 0 min.
Elevation = 0ft
Conservatism = + 3

Dec to 65ft (1) on Air, 50ft/min descent.
Level 65ft 28:42 (30) on Air, 0.62 ppO2, 65ft ead
Asc to 20ft (31) on Air, -30ft/min ascent.
Asc to 15ft (31) on Air, -30ft/min ascent.
Asc to sfc. (32) on Air, -30ft/min ascent.

OTU's this dive: 9
CNS Total: 10.0%

69.0 cu ft Air
69 cu ft TOTAL


DIVE PLAN #5
Surface interval = 0 day 1 hr 0 min.
Elevation = 0ft
Conservatism = + 3

Dec to 65ft (1) on Air, 50ft/min descent.
Level 65ft 28:42 (30) on Air, 0.62 ppO2, 65ft ead
Asc to 20ft (31) on Air, -30ft/min ascent.
Asc to 15ft (31) on Air, -30ft/min ascent.
Asc to sfc. (32) on Air, -30ft/min ascent.

OTU's this dive: 9
CNS Total: 10.7%

69.0 cu ft Air
69 cu ft TOTAL


DIVE PLAN COMPLETE



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