mikeny9
Contributor
I am very confused by what you did. Did you plan a dive to 160 feet using an equivalent depth of 130 feet, or did you plan a dive to 130 feet?
Here are the Buhlmann plans for a dive to 160 feet for 25 minutes on 21/35 with one deco gas, both at sea level and at altitude. Could you tell me what the new RD plans would be for those two dives? Don't worry about what your personal limitations are--I just want to know what the new RD rules are.
Elevation = 0ft
Conservatism = GF 50/80
Dec to 160ft (2) Triox 21/35 60ft/min descent.
Level 160ft 22:20 (25) Triox 21/35 1.20 ppO2, 74ft ead, 92ft end
Asc to 70ft (28) Triox 21/35 -30ft/min ascent.
Stop at 70ft 1:00 (29) Nitrox 50 1.53 ppO2, 32ft ead
Stop at 60ft 1:00 (30) Nitrox 50 1.38 ppO2, 26ft ead
Stop at 50ft 1:00 (31) Nitrox 50 1.24 ppO2, 19ft ead
Stop at 40ft 2:00 (33) Nitrox 50 1.09 ppO2, 13ft ead
Stop at 30ft 4:00 (37) Nitrox 50 0.94 ppO2, 7ft ead
Stop at 20ft 7:00 (44) Nitrox 50 0.79 ppO2, 0ft ead
Stop at 10ft 14:00 (58) Nitrox 50 0.65 ppO2, 0ft ead
Surface (58) Nitrox 50 -20ft/min ascent.
I planned a dive to 130 ft for both the sea level dive and altitude dive, because 130' at 6000 ft elevation is roughly equivalent to 160' at sea level. 160' is my limit at sea level, so I changed both dives to 130'. I can't tell you how a dive to 160' at 6000 ft elevation would look like on RD, because depth adjusting 160' from sea level to altitude goes beyond the depth limit of my training. Ratio deco is introduced to students gradually as they progress. From what I understand, in Tech 2 (200' max depth at sea level), they introduce cascading ratio deco, which I'm not familiar with. If no one answers, and if I end up taking that class, I'll report back.
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