Feedback on recent two-tank and dive limits

[boulderjohn]

My issue is not with the computer, the algorithm or the GFs. My issue is with the acclimatization of a new diver at basic level scuba diving with transition to dive computers. A dive computer with a simpler algorithm interface is going to be easier for the diver, in particular if the diver is just interested in NDL recreational diving.

This is very nearly 100% different from what you were writing a few pages ago.

 

[Blackcrusader]

This is very nearly 100% different from what you were writing a few pages ago.

old frogman:
Conclusion, Erik Baker did not have recreational diving in mind when he developed gradient factors.

Wasn't OF opining that using GF was not suitable for new divers let alone recreational diving?

 

[old frogman]

Aha, now I see the source of your confusion. The usability or ease of use of a particular dive computer has almost nothing to do with what deco algorithm it runs whether that's DSAT, Bühlmann, RGBM, or something else. Those are orthogonal issues. Safety stops can be automatically overlaid on any deco model so DSAT has zero advantage (or disadvantage) on that point. Once you understand how this stuff is actually implemented in code it will make a lot more sense.

I am not confused. I operate a fully loaded VR3 which is far more challenging to use. My point is with the new recreational diver just starting out. It appears from the original question that the diver was confused with the information displayed on his computer (resulting in some anxiety) and I have seen similar threads elsewhere where divers are confused with what is presented on their computer. Some believe that they need to do a safety stop on top of decompression stops. It may be that the computer manuals may need to be reviewed to meet the needs of the new recreational diver, in particular with dive computers that cross over from NDL with safety stop diving to decompression stop diving.

Orthogonal issues - is that like another issue (for the benefit of other readers)?

 

[old frogman]

This is very nearly 100% different from what you were writing a few pages ago.

Not really. Associated issues.

 

[Blackcrusader]

I am not confused. I operate a fully loaded VR3 which is far more challenging to use. My point is with the new recreational diver just starting out. It appears from the original question that the diver was confused with the information displayed on his computer (resulting in some anxiety) and I have seen similar threads elsewhere where divers are confused with what is presented on their computer. Some believe that they need to do a safety stop on top of decompression stops. It may be that the computer manuals may need to be reviewed to meet the needs of the new recreational diver, in particular with dive computers that cross over from NDL with safety stop diving to decompression stop diving.

Orthogonal issues - is that like another issue (for the benefit of other readers)?

The OP was not in Deco so there is no confusion about that. What the OP did not understand was that his Peregrine was set to adaptive stops. What this meant was that if he dove deeper than 30m 100ft or had less than 5 mins NDL left he would be shown a safety stop of 5 minutes over the 3 minutes for shallower dives with 5 mins or less of NDL not being exceeded.

OP had some anxiety as he wanted to make sure his dives were safe which they were. OP also has to learn about Surf GF as this lets divers know when they can ascend as safety stops are not mandatory.
He was also diving on preset settings which he then advised us what is shown for the GF factors.

Which dive computers do not have Deco and NDL functions? They all do. So it is for a user of the dive computer to RTFM which in this case the user had not done. He is doing so now so that he understands what his Peregrine is doing. So yes he has to learn about adaptive stops and what those settings mean, also how to use/ change NDL alert settings. These are simple tasks and covered in the user manuals. No matter what dive computer one buys divers when they do not read the user manual to understand what their DC is telling them can become confused when alarms go off.

Now as for divers doing safety stops after clearing DECO obligations, that can depend on the dive.
If I do a Deco dive where I go to the Ceiling and complete my stops I may simply end the dive.

If I do a Deco dive where I clear Deco but then continue on with a multilevel NDL dive I will do an additional safety stop at my own choosing. I might do 3 minutes at 5m and then another 3 Minutes at 3m depth and then take another minute to get to the surface.

I believe you are over complicating what is a simple request from the OP about his dives. RGBM or GF makes no difference it was him not fully understanding his DC and the fact he got distracted and wasn't paying attention to depth or NDL.

 

[boulderjohn]

Not really. Associated issues.

Here is what you are saying now:

My issue is not with the computer, the algorithm or the GFs. My issue is with the acclimatization of a new diver at basic level scuba diving with transition to dive computers. A dive computer with a simpler algorithm interface is going to be easier for the diver, in particular if the diver is just interested in NDL recreational diving.​

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A few pages ago you were saying that the reason you opposed Buhlmann with GFs is that divers who used it could be required to do multiple decompression stops, starting at 21 meters, on a NDL dive.