Rob you had me going there. Sound like something TJ would like to try.
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Rob you had me going there. Sound like something TJ would like to try.
It's probably closer to 1500-2500 feet at 210+.
I was trying to work with TJ on it a few years back. One of these days we will get our crap together and try it. He's got the balls to do it, I misplaced mine somewhere, need to find 'em. :)
For me -
Hendley's Castle - 32% stage bottle dropped when 1/2 plus 200 psi reached, continue on 21/30 trimix backgas to the bottom of Hendley's Castle at 186 ft. Once back at stage bottle, breathe the 32% back to entrance where you switch to 100% for deco remainder. Figure 30 min to get to Hendley's jump, 10 min in Hendley's, and 30 min to get back. 70 min run time. (PS - I have also done the entire trip on 21/30 backgas and 100% O2 for deco, leaving out the stage. Run deco software to decide which is more beneficial and whether or not the effort carrying a stage bottle is worth it.)
Lower Lower Orange Grove - Drop 100% at 20 ft, drop 50% at 70 ft OR use 32% stage dropped at 100 ft. Continue the dive on 21/30. You will want to plan a multilevel profile for lower to reduce unneeded deco requirements. Max depth will be about 180 ft. But you'll spend probably 5 min at 160, 10 min at 120, 5 min at 180, 10 min at 120, and 5 min at 160. Run time is about 35 min. (PS - you could also just do this dive on 21/30 and 100%. Again, run deco software to decide if you want to add another bottle or not.)
In order to max your use of an expensive trimix fill, you could do both dives in one day with a couple of good hours of surface interval. You're not spending a ton of time at max depth at either site. If I had a buddy wanting to do both that day, that's what I'd do. Just follow your dive computer and add a few minutes for margin.
Thanks to everyone who answered, also in PM. I think answers should be saved in some cave database, i found it very useful and it makes a good shortcut in dive planning.