Apeks DSX TTS logic ?

[Winmit]

soo....does anyone wants to by Apeks DSX...50 dives

 

[Alekseolsen]

Pretty sure it was a design decision, as it's cheaper to implement the simpler algorithm. "TTS" goes on the feature list, and it would be a tiny fraction of buyers who would care about the specifics (single vs multi-gas) AND be able to return it if multi-gas TTS were critical to them.

It's just crazy to me that someone can make a design decision that defeats the main purpose of a dive computer - accurately and "online" provide decompression-information to the user.

Unfortunately the manual have no description of the function, as I almost assumed the deco gases had been switched off or something like that.

 

[ginti]

@Winmit I believe most tech divers plan their dives and the more a diver is advanced, the more they rely on a plan, the less this feature is important.

My perception could be biased, as most of my buddies plan in advance, knows how to make easy calculations (at least in the 0/60m range, no more than 30/40min deco), and the feature you mentioned is just nice to have, period. I wouldn't even bother to look for this feature in a computer, I simply don't need it for now.

Again, maybe it's just a bias, and other divers would pay more attention to this feature, I can't say that for sure.

 

[Winmit]

Alekseolsen​

Nope, i read the manual a few times, i don't see the option. If I haven't added the gas, then I wouldn't be able to switch to it on the stop

Ginti
Well I do plan upfront. I also write down on a slate as backup if I don't have a second tech computer. But the thing is that when I plan I know that i.e. for a 40m deco from depth X I would need approx Y amount of gas. So when I dive when I reach the Y amount I know that this is the minimum I need. If I have exceeded the depth thus making the TTS longer, the gas amount doesn't count. So having both TTS and gas amount give me more flexibility. I know that I should go either when I hit my TTS limit or my minimum gas (ofc with all the needed budy bailout etc calcs, which I have done upfront).
Having shown a TTS of 80m+ when I have planned the gas for a 40mins TTS makes the flexibility of the computer a bit less. In such case I need to plan the "old school" - this depth this time. Over. No flexibiliry

 

[ginti]

Ginti
Well I do plan upfront. I also write down on a slate as backup if I don't have a second tech computer. But the thing is that when I plan I know that i.e. for a 40m deco from depth X I would need approx Y amount of gas. So when I dive when I reach the Y amount I know that this is the minimum I need. If I have exceeded the depth thus making the TTS longer, the gas amount doesn't count. So having both TTS and gas amount give me more flexibility. I know that I should go either when I hit my TTS limit or my minimum gas (ofc with all the needed budy bailout etc calcs, which I have done upfront).
Having shown a TTS of 80m+ when I have planned the gas for a 40mins TTS makes the flexibility of the computer a bit less. In such case I need to plan the "old school" - this depth this time. Over. No flexibiliry

Spoiler: I am going to describe what I do; I don't think that's the right way to do, the only one or anything else - it's just what I do

When I plan, I plan the dive I expect to do, plus several dives at the same average depth but longer (several minutes) to take into account eventual troubles I have to fix underwater. I also plan for increased average depth, in case for whatever reason I have to spend more time than expected on the deepest portion of the dive.

I really, really need to screw it up before being unable to have a clue of the deco I have to do. So much that deco is likely the least important problem at that point.

But this is how I do. I can see the benefit of that function, and I can understand that you don't appreciate a computer without it.

 

[Winmit]

ginti

Yes, i see what you mean. thats more the old-school. totally valid, but why not use the benefits of technologies. Tbh I had same feature I think on even a low tech computer. I think it was so on Scubapro Luna 2.0

 

[dylanfromwinnipeg]

Shearwater has a great blog about a more computer centric approach to managing deco planning that relies heavily on TTS. Evolution of Dive Planning