This thread seems to be the compendium of H3 knowledge and a place where it has received some support, so I figured I'd ask here.
Basically, what about the info in this thread?
http://www.scubaboard.com/forums/co...analyzers/520314-step-up-dive-computer-2.html
What victorzamora has posted there about his experience with the H3 makes it sound like the H3 has a serious issue with tracking decompression obligations. 2 examples of what he said:
- stopping at 20' does not shorten the time the H3 requires at 10' at all.
- 20 minutes at 50' don't affect the time required to stop at 30'.
If I have understood what he wrote correctly (which is always suspect), the contrasting (and preferred) behavior that one would find in a Petrel is that if one wanted to do one's last stop at 20', a deco ceiling of 10' would be cleared by stopping at 20' and waiting just a bit longer than the 10' stop requires. And, when ascending from some deeper depth where you have incurred a deco stop at 30', spending 20 minutes at 50' would (substantially, I think) reduce the time required to be spent at 30'.
I emailed Sub Gravity earlier today to see what they have to say about this behavior. I have not heard back yet, but it has only been a few hours. But, really, a response here (on in the linked thread) would potentially help a lot more people than just me.
I ordered an H3 yesterday. If I can't get some verification that this behavior is resolved or some explanation of why victorzamora experienced these things, I think I will have to return the H3 for a refund. There is no way I want to do deco dives with a computer that won't let me do my final stop at 20 or 30 feet if I want to and still clear my final deco obligation in the time that would be predicted by ZHL-16C and my GF settings. Ocean conditions are sometimes pretty rough on the surface and it is highly desirable to make the last stop at a depth like 30', to stay below the surface surge (at least to some degree).
Caveat: I am currently taking the TDI Deco Procedures class. I have completed the classroom portion and a bunch of training dives, but I have not yet done my first real deco dive. So, maybe I am somehow just really not understanding this.