I was not crazy about the 1500 psi turn pressure because I have gotten use to diving 1/3rds and thought people should be turning at 2000. But by following the general pattern of the dives and turning at their 30 minute limit I was still getting back on the boat with about 1/2 of my gas. I just can't envision that rule of getting back on a boat with only 800 psi anymore. I want about 1200 to 1300 psi on the boat after a one hour dive, no matter what the depth.
This is likely an issue of 'where you stand on an issue depends on where you sit,' and 'different strokes for different folks.' You are a woman, which many associate with lower SAC rates, and you obviously use relatively little gas.
I'm a guy, 6'1, nearly 275#, chunky & mid. 40's. No real shock, I go through gas a lot faster than you. My computer-calculated SAC rate tends to run around 0.65 cf/min. Not real bad, all things considered, but if I considered 2,000 PSI my turn pressure & thought I was supposed to get back to my entry point with 1,000 PSI, I'd dive really short profiles.
After all, with the typical Bonaire op. situation, you and I would probably be diving the same tanks (80 cf aluminums).
I shore dive there, not boat, but here's how I tend to handle dive planning there (west coat, warm water, great viz., minimal current, land very close).
1.) Wade out, go down, drop to around 30 - 40 feet. Swim parallel to shore, into mild current (if I can tell which way it's coming from). Drop down deeper if I see something interesting, then come back up. Typical Bonaire fill, once cooled down, in my experience is around 2900 starting the dive. Give or take 150 PSI.
2.) Turn around 1600 PSI. Make the swim back in 20 - 30 feet of water. In fact, if the reef is fairly shallow, get up to 15 - 20 feet & let the dive computers kick in & start counting off the 3 min. safety stop.
3.) Once back in the general area of the exit, mess around in the shallows - exploring rubble, etc... Water depth around 8 to 15 feet deep.
4.) Walk out with maybe 300 - 600 PSI in tank. Being mindful that toward the end, I'm so shallow I'm right off the bottom, and at times could stand up & stick my head out of the water if I wanted to. Typical dive info. on computer might be 50 minute dive, max. depth 60 feet, average depth 25 feet.
This profile provides generous off-gassing, and while non-traditional in terms of gas planning, accounts for conditions. I'm using my 'rubble crawl' like some of you use lengthy safety stops close to a dive boat.
Richard.
