Vandenberg report and profile shock!

[flots am]

20 minutes @ 100' does not require deco, 20 minutes is the NDL.

vPlanner requires just short of 11 minutes of deco.

flots

 

[nimoh]

vPlanner requires just short of 11 minutes of deco.

flots

PADI NDL @100' - 20 minutes
SSI NDL @ 100' - 20 minutes
NAUI NDL @100' - 22 minutes
US Navy NDL @100' - 25 minutes

 

[flots am]

PADI NDL @100' - 20 minutes
SSI NDL @ 100' - 20 minutes
NAUI NDL @100' - 22 minutes
US Navy NDL @100' - 25 minutes

Not sure what to tell you, except that you spin the wheel and take your chances.

I'll go with vPlanner. It's had a lot more "real life testing" for deeper/longer dives than the PADI tables, and the Navy tables are only useful if you happen to have a Navy and it's resources and are 20-something years old.

flots.

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

Dec to 100ft (2) Air 50ft/min descent.
Level 100ft 18:00 (20) Air 0.85 ppO2, 100ft ead
Asc to 30ft (22) Air -30ft/min ascent.
Stop at 30ft 0:40 (23) Air 0.40 ppO2, 30ft ead
Stop at 20ft 3:00 (26) Air 0.34 ppO2, 20ft ead
Stop at 10ft 6:00 (32) Air 0.27 ppO2, 10ft ead
Surface (32) Air -30ft/min ascent.

Off gassing starts at 68.6ft

OTU's this dive: 15
CNS Total: 5.1%

67.8 cu ft Air
67.8 cu ft TOTAL

 

[nimoh]

Not sure what to tell you, except that you spin the wheel and take your chances.

I'll go with vPlanner. It's had a lot more "real life testing" for deeper/longer dives than the PADI tables, and the Navy tables are only useful if you happen to have a Navy and it's resources and are 20-something years old.

flots.

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

Dec to 100ft (2) Air 50ft/min descent.
Level 100ft 18:00 (20) Air 0.85 ppO2, 100ft ead
Asc to 30ft (22) Air -30ft/min ascent.
Stop at 30ft 0:40 (23) Air 0.40 ppO2, 30ft ead
Stop at 20ft 3:00 (26) Air 0.34 ppO2, 20ft ead
Stop at 10ft 6:00 (32) Air 0.27 ppO2, 10ft ead
Surface (32) Air -30ft/min ascent.

Off gassing starts at 68.6ft

OTU's this dive: 15
CNS Total: 5.1%

67.8 cu ft Air
67.8 cu ft TOTAL

well, it's more conservative so it must be better right? What do agencies know anyway.

Incidentally, I use v-planner for decompression dives, but within limits of the 120/130 rule, I will just use a minimum decompression profile.

My point is just that decompression is not required for a 20 minute dive to 100', but I would still recommend (as would agencies) a safety stop. However, I would also suggest that the PADI tables have much more real life testing on dives to 100'. This thread is not about dives beyond recreational limits.