Gas Plan Poll

[rongoodman]

Minimum gas for open water, for the Mexican caves, 1/3s plus a few hundred pounds, unless serious restrictions are involved, in which case it's even more conservative.
(I learned about minimum gas from GUE, and the cave stuff from Protec in my cave classes.)

 

[MaxBottomtime]

There should be a none of the above option. For tech dives I follow very conservative gas procedures, but for relatively shallow recreational dives I try to surface with at least 14.7psi to keep water out of my tank.

 

[TSandM]

I use min gas/RB and a gas apportionment strategy according to the profile. I learned it originally from NW Grateful Diver, and it was repeated in all my GUE and UTD classes.

 

[tomfcrist]

By staying within no deco limits my gas plan takes care of itself. I dive lp 121 tanks, so even with a 2400 fill I am back on the boat with 1200 psi if I don't do deco. Hell I can do a 30 minute bottom time at 130 on air and still be back on the boat after deco with 400. Gas hogs and extended deco divers are the folks that need conservative gas plans. Good sac or limited deco, basic mathematics are all that is needed

 

[TONY CHANEY]

For tech dives I follow very conservative gas procedures...

Kindy funny considering that your name on here is MaxBottomtime. And yes that is a joke.

Now what I failed to include for cave diving it also depends if it an upstream or downstream (siphon) dive.

 

[Cyprian]

GUE gas rules for me, all of which include min deco...as has already been pointed out.

 

[scubadada]

There should be a none of the above option. For tech dives I follow very conservative gas procedures, but for relatively shallow recreational dives I try to surface with at least 14.7psi to keep water out of my tank.

The majority of my dives are drift dives in South FL to about 60 feet. I'm a little more conservative than MaxBottomtime in that I generally head up at 4-500 psi and surface high 200s to high 300s psi. After a couple hundred of these dives, the 3 cu ft of gas I need for the 5 minutes, is extremely predictable

When I dive with my wife, I come up with 1000 psi or more, that's a different kind of plan

 

[j2s]

All depends on the situation/environment.......

 

[ermaclob]

like almost every one has said all depends on the situations

for me, overhead dives are 1/3 rule with gas matching.

solo dives are in doubles and follow a loose 1/3 rule depending if im in a very easy site shallow etc.

dive on single tanks are normally beach dives with buddys so very very shallow ~20 ft max. depending on conditions we normally leave em pretty empty. like 200 psi some times.

single tank charter boat dives for me are normally to short to get my tanks past the last 1/3 but its normally 500psi minimum if with a good buddy.

i do like having extra gas for emergencies, so i do prefer to plan thing so im back with a good amount

 

[GCullen94]

Thanks everyone, I posted this after a little (ongoing) debate on another thread (http://www.scubaboard.com/forums/ba...470748-rule-thirds-shallow-rec-diving-27.html) Just wanted to see what other people use in gas planning. I'm sorry I wasn't more site specific. How about this, It's a boat dive to 80-100, under recreational rules so no overhead, what gas plan would you use then and why?
Thanks,
GC