At the risk of getting us back into "the deco on a single AL 80 argument", I do think it needs to be pointed out that:The Kraken:Here are some more based on different SAC and depths.
The SAC rate will be the first number. The following numbers will be the depth/time based upon an AL80 with 500 psi remaining:
.40 - 50/64, 60/57, 70/51, 80/47, 90/43, 100/40
.50 - 50/51, 60/45, 70/41, 80/37, 90/34, 100/32
.60 - 50/42, 60/38, 70/34, 80/31, 90/29, 100/26
.40 - 60/57, 70/51, 80/47, 90/43, 100/40
.50 - 70/41, 80/37, 90/34, 100/32
.60 - 80/31, 90/29, 100/26
are all schedules that would require decompression even on the first dive of the day. 100 ft for 40 minutes requires a 15 minute stop at 10 ft even with the very liberal US Navy tables. When you figure gas used in the ascent and at the 10 ft stop, you are going to be OOA or very close too it. (and doing intentional deco on a singlel tank is in fact just plain stupid as you have no redundant gas supply in case you experience a failure of your primary system.)
So I guess my point is, what exactly is the point of pushing your SAC to low extremes - bragging rights for most air remaining back on the boat?
The thing many divers do not consider is that the quest for low SAC rates often involves CO2 retention and problems stemming from that such as increased suceptibility to nitorogen narcosis and oxygen toxicity as well as really painful and persistent CO2 headaches. Plus you get so focused on lowering your SAC that you enjoy the dive a lot less.
In my opinion you need to work on developing excellent bouyancy skills, learn to move efficiently in the water with no flapping arms or extra leg, trunk or body movement, develop a cleaner and more streamlined gear configuration to reduce the power required to move at a given speed and develop an efficient breathing pattern consisting of breathing deeply and pausing slightly at the top of the inhale to maximize gas exchange.
Pushing it beyond that to try to get the lowest SAC on the boat by extending the pause or using an unnaturaly slow inhalation and exhalation is potentially dangerous and more than a little stupid.