Ceiling calculations on 2nd dive, comparing Subsurface, OSTC and Garmin.

[Michael Andreen]

Hi,

I started a thread on the OSTC forum because I noticed that the ceiling 
calculations on my new OSTC Sport for the 2nd dive of the day was quite 
different from the calculations that I get from Subsurface and Garmin Descent 
MK2i, all using the same gradient factors.

https://forum.heinrichsweikamp.com/viewtopic.php?t=22304

I guess there are a few OSTC divers here, has anyone noticed similar 
differences to the Subsurface calculations? How does Shearwater match up? The 
dives I've done with my Garmin has always matched within a few minutes, for 
both the first dive and repetitive dives.

/Michael