Planner: minimum Gas on CCR dives

Davide DB dbdavide at
Tue Apr 3 03:24:13 PDT 2018

On 30 March 2018 at 21:20, Robert Helling <helling at> wrote:
> As you noticed, Subsurface does not attempt to calculate any gas usage in CCR mode. But what you could do is to add an extra waypoint at the end of your bottom time (with a duration of 1 minute, say) and in the waypoint enter a 0 in the set point column. This signifies bailout to OC. That should turn on the gas calculation for the ascent including minimum gas.

I tried it but minimum gas calculation is not triggered.

> Subsurface calculates minimum gas only for the last bottom gas. Thus it does not have to take into account the switch time. It takes into account the SAC factor (multiplying the SAC for higher gas usage plus the problem solving time as entered in the corresponding field).

Thanks Robert


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