Trimix diving with v planner

List
Is there many people out there that are using the V planner on trimix dives. I compared teh V planner to about 4 other deco planners and on trimix dives the v planner is getting you out of the water in about half the time. Nitrox dives I did not notice much difference in time only with the trimix. I have used the v planner on some deco dives lately but to use it on trimix dives I do not have the &*%$# to do it yet. Not interested in getting bent but but if something works it works.

Bruce

I have a groupm of friend which is about 20 divers who are doing dives based on computer generated tables.

of those divers the only ones i know wo have been bent where using V Planner for their profile.

ok, if not v planner, what DO you use aquatec?
(I'm not doing trimix yet myself, so don't really have any useful input other than I have been using gap for deco)

I've done a few mix dives on V-Planner with no problems.

Half the time is a major overstatement. We're planning a 220' 30m on 15/55 currently. There's about a 6 or 8 minute difference in total runtime between v-planner and deco-planner.

Tom

I have done several mix dives with V-planner between 150 and 175 and bottom times of about 25 min. I crank the conservatism a bit but the schedules were comparable to d-plan or gap using gradient factors of like .2 and .9. I normally use gradient factors of .2 and .7.

We are fairly conservative but we never had a problem. Most of the hits I've heard of on V-planner were divers who had the conservatism turned way down or made obvious errors.

I use Proplanner.
I have never tried V-planner. this is only a statistic from a group of divers i know

I just dove this profile Nov.1/02, didn't get bent hope it helps!
Dec to 170ft (3) on Trimix 21.0/35.0, 50ft/min decent.
Level 170ft 16:36 (20) on Trimix 21.0/35.0, 1.29 ppO2, 80ft END
Asc to 100ft (21) on Trimix 21.0/35.0, -60ft/min ascent.
Asc to 90ft (21) on Trimix 21.0/35.0, -30ft/min ascent.
Stop at 90ft 0:30 (22) on Trimix 21.0/35.0, 0.78 ppO2, 35ft END
Stop at 80ft 1:00 (23) on Trimix 21.0/35.0, 0.72 ppO2, 30ft END
Stop at 70ft 1:00 (24) on Nitrox 50.0, 1.56 ppO2, 32ft END
Stop at 60ft 1:00 (25) on Nitrox 50.0, 1.41 ppO2, 26ft END
Stop at 50ft 1:00 (26) on Nitrox 50.0, 1.26 ppO2, 20ft END
Stop at 40ft 2:00 (28) on Nitrox 50.0, 1.10 ppO2, 13ft END
Stop at 30ft 2:00 (30) on Nitrox 50.0, 0.95 ppO2, 7ft END
Stop at 20ft 2:00 (32) on Nitrox 50.0, 0.80 ppO2, 1ft END
Stop at 15ft 8:00 (40) on Nitrox 50.0, 0.73 ppO2, 0ft END
Asc to sfc. (40) on Nitrox 50.0, -30ft/min ascent.

List,

This is the dive profile I was thinking of doing. I have a copy of the GAP, ANDI, Voyager, pro planner and a Sheck Exley plan and they all give some what similiar profiles. The V planner give the shortest run times but do alot deeper stops. I have used v planner on nitrox dives but nothing with trimix. Is this v planner similiar to the GUE profiles. I would feel a whole lot better knowing if others are doing these profiles then being a human ginny pig myself.

Bruce

Surface interval = 1,440 minutes.
Altitude = 0m
Conservatism = + 4, Critical Volume = ON

Dec to 60m (4) on Trimix 12.0/52.0, 15m/min decent.
Dec to 100m (6) on Trimix 12.0/52.0, 18m/min decent.
Level 100m 8:47 (15) on Trimix 12.0/52.0, 1.30 ppO2, 40m END
Asc to 72m (16) on Trimix 12.0/52.0, -18m/min ascent.
Stop at 72m 1:00 (17) on Trimix 12.0/52.0, 0.97 ppO2, 27m END
Stop at 69m 1:00 (18) on Trimix 12.0/52.0, 0.94 ppO2, 26m END
Stop at 66m 1:00 (19) on Trimix 12.0/52.0, 0.90 ppO2, 25m END
Stop at 63m 1:00 (20) on Trimix 12.0/52.0, 0.86 ppO2, 23m END
Stop at 60m 1:00 (21) on Trimix 12.0/52.0, 0.83 ppO2, 22m END
Stop at 57m 1:00 (22) on Trimix 12.0/52.0, 0.79 ppO2, 20m END
Stop at 54m 1:00 (23) on Trimix 12.0/52.0, 0.76 ppO2, 19m END
Stop at 51m 1:00 (24) on Trimix 12.0/52.0, 0.72 ppO2, 18m END
Stop at 48m 1:00 (25) on Trimix 12.0/52.0, 0.69 ppO2, 16m END
Stop at 45m 2:00 (27) on Trimix 12.0/52.0, 0.65 ppO2, 15m END
Stop at 42m 2:00 (29) on Trimix 12.0/52.0, 0.62 ppO2, 14m END
Stop at 39m 1:00 (30) on Nitrox 32.0, 1.55 ppO2, 32m END
Stop at 36m 1:00 (31) on Nitrox 32.0, 1.45 ppO2, 29m END
Stop at 33m 1:00 (32) on Nitrox 32.0, 1.36 ppO2, 27m END
Stop at 30m 1:00 (33) on Nitrox 32.0, 1.26 ppO2, 24m END
Stop at 27m 2:00 (35) on Nitrox 32.0, 1.17 ppO2, 22m END
Stop at 24m 2:00 (37) on Nitrox 32.0, 1.07 ppO2, 19m END
Stop at 21m 2:00 (39) on Nitrox 32.0, 0.98 ppO2, 17m END
Stop at 18m 3:00 (42) on Nitrox 32.0, 0.88 ppO2, 14m END
Stop at 15m 4:00 (46) on Nitrox 32.0, 0.79 ppO2, 11m END
Stop at 12m 4:00 (50) on Nitrox 70.0, 1.52 ppO2, 0m END
Stop at 9m 5:00 (55) on Nitrox 70.0, 1.31 ppO2, 0m END
Stop at 6m 4:00 (59) on Nitrox 70.0, 1.11 ppO2, 0m END
Stop at 4.5m 14:00 (73) on Nitrox 70.0, 1.00 ppO2, 0m END
Asc to sfc. (73) on Nitrox 70.0, -9m/min ascent.

O

Tom is right. The deco gasses are all wrong. You can have the best table, but it is worthless if you use the wrong gasses. EAN32 is worthless once you get a couple stops past its MOD. EAN70 does not help you once you are on your shallow stops.

The bottom line is if you are trying to offgas and eliminate nitrogen during decompression, why would you introduce any more nitrogen during decompression? It is counter-productive.

If you can get EAN70, there is no reason you should not be able to get 100% O2.

Also, why the long/slow descent? Does the dive require you to pull down an anchor line? If possible, try to free-drop on descent: it is faster and more efficient (less work), which conserves gas and makes it easier.

Cheers,
Mike