Dive Planner and CCR bailout clarifications
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Paul
Dec 11, 2022, 5:57:20 PM12/11/22
to Subsurface Divelog
Hi,
I have been playing around with Subsurface and the Dive Planner feature.
When planning a Trimix CCR dive and the bailout particulars, I noticed some odd behaviors. Not sure if this is expected or if these are bugs.
1. In available gases, I set up my diluent gas and all my available BO gases. I mark the diluent as 'not used' and all BO as 'OC-gas' in the 'Use' column.
Therefore, when I check the BO box, I would expect the planner to use the first leanest OC-gas and leave the diluent out (I do not bailout using the diluent as I don't use a BOV).
However, the planner selects the diluent as first BO gas. I believe in this particular scenario, this is because it is the leanest among all gases. This would mean the planner does not take into account the 'Use' parameter for Bailout on OC?
2. In order to workaround 1., I add up a one min leg at the end of bottom leg, using the first BO OC-gas I desire. Now the planner behaves as expected, except that it shows in red the OC gas with a CC SP next to the bottom segment (as if the gas was used for CCR), which does not make any sense. I would expect to not see anything next to the bottom segment since gas remains the same as the descent segment. It seems this is only a display issue and the gas used for the bottom leg is really the diluent.
I would appreciate if someone could clarify.
Thanks,
Paul
I have been playing around with Subsurface and the Dive Planner feature.
When planning a Trimix CCR dive and the bailout particulars, I noticed some odd behaviors. Not sure if this is expected or if these are bugs.
1. In available gases, I set up my diluent gas and all my available BO gases. I mark the diluent as 'not used' and all BO as 'OC-gas' in the 'Use' column.
Therefore, when I check the BO box, I would expect the planner to use the first leanest OC-gas and leave the diluent out (I do not bailout using the diluent as I don't use a BOV).
However, the planner selects the diluent as first BO gas. I believe in this particular scenario, this is because it is the leanest among all gases. This would mean the planner does not take into account the 'Use' parameter for Bailout on OC?
2. In order to workaround 1., I add up a one min leg at the end of bottom leg, using the first BO OC-gas I desire. Now the planner behaves as expected, except that it shows in red the OC gas with a CC SP next to the bottom segment (as if the gas was used for CCR), which does not make any sense. I would expect to not see anything next to the bottom segment since gas remains the same as the descent segment. It seems this is only a display issue and the gas used for the bottom leg is really the diluent.
I am attaching a screenshot for both cases:
1.
2.
Thanks,
Paul
Paul
Feb 7, 2023, 2:40:54 PM2/7/23
to Subsurface Divelog
Hi,
Sorry to bump this up. Is anyone able to clarify?
Thanks!
Michael Keller
Feb 8, 2023, 4:40:54 PM2/8/23
to Subsurface Divelog
Hi Paul.
Thank you for reporting this - this is a bug in Subsurface.
I have recently had an improvement to gas planning for CCR dives added, but unfortunately when I made the improvement I was not aware of the bug and did not come across it during my testing.
I'll be looking into fixing this in the next few weeks.
Cheers
Michael Keller
Paul
Feb 8, 2023, 6:54:26 PM2/8/23
to Subsurface Divelog
Hi Michael,
Thanks for your reply and confirming my suspicion.
I'll wait for this to be fixed then. Thanks in advance for your time and dedication on fixing it!
Michael Keller
Feb 17, 2023, 8:41:40 AM2/17/23
to Subsurface Divelog
Hi Paul.
Both bugs are on the way to be fixed now:
Thanks again for reporting!
Cheers
Michael Keller
Paul
Feb 17, 2023, 3:00:08 PM2/17/23
to Subsurface Divelog
Hi Michael,
Awesome! Thanks for letting me know.
Have a nice weekend.
Paul
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