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Re: How deep is the Moody?


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Posted by Ross-O on April 30, 2006 at 22:41:53:

In Reply to: How deep is the Moody? posted by Elaine on April 30, 2006 at 22:03:53:

Hi Elaine,

I show between 144 & 148 on the 7 dives that I've done there.

If you round down to 150fsw and choose a max PPO2 of 1.4 then you could use up to 25% O2 as your gas. It wouldn't make too much of a difference from a clear head standpoint because it would only shave about 10ft off your Equivalent Air Depth. Depending on your computer, it could save you somewhere around 8 mins of deco (25 mins on air vs 18 mins on Nitrox 25).

Here's what VPlanner looks like for 150ft with a 15 min BT on Nitrox 25.

Decompression model: VPM-B

DIVE PLAN
Surface interval = 2 day 0 hr 0 min.
Altitude = 0ft
Conservatism = Nominal

Dec to 150ft (3) on Nitrox 25.0, 50ft/min descent.
Level 150ft 12:00 (15) on Nitrox 25.0, 1.38 ppO2, 141ft EAD
Asc to 50ft (18) on Nitrox 25.0, -30ft/min ascent.
Stop at 50ft 0:40 (19) on Nitrox 25.0, 0.63 ppO2, 46ft EAD
Stop at 40ft 2:00 (21) on Nitrox 25.0, 0.55 ppO2, 36ft EAD
Stop at 30ft 2:00 (23) on Nitrox 25.0, 0.48 ppO2, 27ft EAD
Stop at 20ft 3:00 (26) on Nitrox 25.0, 0.40 ppO2, 17ft EAD
Stop at 10ft 7:00 (33) on Nitrox 25.0, 0.33 ppO2, 8ft EAD
Asc to sfc. (33) on Nitrox 25.0, -30ft/min ascent.

Off gassing starts at 88.5 ft

OTU's this dive: 26
CNS Total: 10.2%

68.4 cu ft Nitrox 25.0
68.4 cu ft TOTAL

Here's the same dive on air.

Decompression model: VPM-B

DIVE PLAN
Surface interval = 2 day 0 hr 0 min.
Altitude = 0ft
Conservatism = Nominal

Dec to 150ft (3) on Air, 50ft/min descent.
Level 150ft 12:00 (15) on Air, 1.16 ppO2, 150ft EAD
Asc to 60ft (18) on Air, -30ft/min ascent.
Stop at 60ft 1:00 (19) on Air, 0.59 ppO2, 60ft EAD
Stop at 50ft 2:00 (21) on Air, 0.53 ppO2, 50ft EAD
Stop at 40ft 2:00 (23) on Air, 0.46 ppO2, 40ft EAD
Stop at 30ft 3:00 (26) on Air, 0.40 ppO2, 30ft EAD
Stop at 20ft 5:00 (31) on Air, 0.34 ppO2, 20ft EAD
Stop at 10ft 9:00 (40) on Air, 0.27 ppO2, 10ft EAD
Asc to sfc. (40) on Air, -30ft/min ascent.

Off gassing starts at 95.5 ft

OTU's this dive: 20
CNS Total: 7.4%

76.3 cu ft Air
76.3 cu ft TOTAL

Cheers,
Ross-O




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