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cramerdn · 30th December 2006, 02:49

From what you wrote your friend got bent by diving beyond the No Deco limits without doing any deco.

The first dive of 26.7 m for 45 minutes is well beyond the Navy tables 30 minute no-deco limit for 28 m. If you use a Padi table its only 20 minutes for no-deco, but you have to use the 30 m numbers.

When I plugged the first dive into V planner (on nominal conservatism) I got

Decend to 26.5m (1) Air 15m/min descent.
Level 26.5m 43:14 (45) Air 0.76 ppO2, 27m ead
Ascend to 9m (46) Air -9m/min ascent.
Stop at 9m 3:03 (50) Air 0.40 ppO2, 9m ead
Stop at 6m 7:00 (57) Air 0.34 ppO2, 6m ead
Stop at 3m 13:00 (70) Air 0.27 ppO2, 3m ead
Surface (70) Air -9m/min ascent.

So V planner says you owed about 23 minutes of deco

If your dives were not all at the depth you listed then you will have to use the depths and times to build a profile to see if you exceeded any limits.

Was there a computer involved?

When you say The dives were "well within the No-deco limits" what limits were you using?

30th December 2006, 02:49	#2 (permalink)
cramerdn Obey my dog! Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 730	Re: DCI: What could have triggered it? From what you wrote your friend got bent by diving beyond the No Deco limits without doing any deco. The first dive of 26.7 m for 45 minutes is well beyond the Navy tables 30 minute no-deco limit for 28 m. If you use a Padi table its only 20 minutes for no-deco, but you have to use the 30 m numbers. When I plugged the first dive into V planner (on nominal conservatism) I got Decend to 26.5m (1) Air 15m/min descent. Level 26.5m 43:14 (45) Air 0.76 ppO2, 27m ead Ascend to 9m (46) Air -9m/min ascent. Stop at 9m 3:03 (50) Air 0.40 ppO2, 9m ead Stop at 6m 7:00 (57) Air 0.34 ppO2, 6m ead Stop at 3m 13:00 (70) Air 0.27 ppO2, 3m ead Surface (70) Air -9m/min ascent. So V planner says you owed about 23 minutes of deco If your dives were not all at the depth you listed then you will have to use the depths and times to build a profile to see if you exceeded any limits. Was there a computer involved? When you say The dives were "well within the No-deco limits" what limits were you using?
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