Average Gas Consumption

[scubadada]

That was quick, now more than 78,000 views and 11 more votes in the poll, now 910.

The median, mode, and weighted average remain 0.5-0.59 cu ft/min or 14.2-16.9 l/min.

If you have not voted in the poll, please consider doing so. If your average RMV has changed, please change your vote.

The best of diving to everyone

 

[scubadada]

Wow, now more than 79,000 views and 916 votes in the poll.

The median, mode, and weighted average remain 0.5-0.59 cu ft/min or 14.2-16.9 l/min.

If you have not voted in the poll, please consider doing so. If your average RMV has changed, please change your vote.

Enjoy your diving

 

[scubadada]

I was going through the profiles of my dives from a recent trip to Bonaire and found a good example of the effect of moderate exertion on gas consumption. This is a simple 70 min out and back dive on Bari Reef. On the way out, we were swimming against a brisk south current. On the way back, the current was lighter but still south. My overall RMV for the dive was 0.34 cu ft/min. On the way out my RMV varied from about 0.34-0.41 cu ft/min. On the way back my RMV decreased to 0.26-0.31 cu ft/min. My usual RMV on this dive when there is no current is around 0.3 cu ft/min.

 

[scubadada]

More than 80,000 views and 923 votes in the poll

The median, mode, and weighted average remain 0.5-0.59 cu ft/min or 14.2-16.9 l/min.

If you have not voted in the poll, please consider doing so. If your average RMV has changed, please change your vote.

Best diving to all

 

[sena_akutsa]

voted 0.5-0.59 cu ft/min (14.2-16.9 L/min)

after our latest dive I calculated 15.4 L/min,
my torch light got entangled in an abandoned net while freeing a fish. Also at the end of the dive we were 3 to move anchor and chain away from the wreck before ascending, approximately 5 min of medium exercice.

on other dives, I calculated 12-14 L/min, depending on current.
- my buddy and I, both noticed that the less Lead we carry, the less we consume;
the "minimum" reached with 3mm wet suit, Beuchat jacket, 12L steel tank, and 0 Kg... but it becomes a challenge in case a DSMB needs to be deployed

EDIT: forgot to mention, recreational dives in tropical water around 28°C (82°F)

 

[scubadada]

That was quick, another 1,000 views, now more than 81,000. Six more votes in the poll, now at 929.

The median, mode, and weighted average remain 0.5-0.59 cu ft/min or 14.2-16.9 l/min.

If you have not voted in the poll, please consider doing so. If your average RMV has changed, please change your vote.

Enjoy your diving

 

[Blackcrusader]

@Dan

A SAC of 0.61 bar/min with an AL80 (11.1 L) is a very, very low RMV, 6.8 L/min or 0.24 cu ft/min

@rsingler

Just back from Maldives. 35 dives in 12 days at Fuvahmulah then a day off then 12 dives in 4 days in Male.

In Fuvahmulah except for the Tiger Zoo dives where you may go off the boat down to around 15m then up to around 8m at the wall where divers watch the Tigers most of my other dives are deeper than 30m depth and several were deeper than 40m in currents. Some deco dives thrown in. So the dives that had me working hard against the currents I still managed to have less than 1.0 bar/min and one dive where I did 1.01 bar/min. One one of these dives a visiting guide from India guide ran himself down to 50 bar after 25 mins and had to call the dive. I was not amused as I came up with 100 bar and many other divers had plenty of air left.

So pretty much all of my dives in the currents were .7bar/min to .9 bar/min and the dives where I really exerted myself. In Male really no against the current dives except the wreck and the manta site. Even then at the Manta site I had good consumption but on the dive below I did find a place to shelter to get a video of manta at the last ten mins end of the dive. Great dive would have stayed longer but our guide was down to 50 bar when he signalled to head back to the safety stop. I had 80 at the time.

All the divers are on AL80's and I did switch to Nitrox for my final 9 dives and Nitrox of course does not improve your gas consumption. Thris trip my UK dive buddy I noticed also improved his gas consumption over previous trips we have done together. But he did have sinus surgery last year and was cleared for diving before we did Nov December 24 in Maldives.

Going to Philippines in August for some shallower 20 - 25m max depth dives in Dauin and Panglao Bohol. These will be almost no current dives so expect to be in the .60 to .70 bar/min averages again.