diff options
Diffstat (limited to 'dive.c')
| -rw-r--r-- | dive.c | 8 |
1 files changed, 6 insertions, 2 deletions
@@ -1683,8 +1683,12 @@ extern void fill_pressures(struct gas_pressures *pressures, const double amb_pre } else { if (divemode == PSCR) { /* The steady state approximation should be good enough */ pressures->o2 = get_o2(mix) / 1000.0 * amb_pressure - (1.0 - get_o2(mix) / 1000.0) * prefs.o2consumption / (prefs.bottomsac * prefs.pscr_ratio / 1000.0); - pressures->he = (amb_pressure - pressures->o2) * get_he(mix) / (1000.0 - get_o2(mix)); - pressures->n2 = (amb_pressure - pressures->o2) * (1000 - get_o2(mix) - get_he(mix)) / (1000.0 - get_o2(mix)); + if (get_o2(mix) != 1000) { + pressures->he = (amb_pressure - pressures->o2) * get_he(mix) / (1000.0 - get_o2(mix)); + pressures->n2 = (amb_pressure - pressures->o2) * (1000 - get_o2(mix) - get_he(mix)) / (1000.0 - get_o2(mix)); + } else { + pressures->he = pressures->n2 = 0; + } } else { // Open circuit dives: no gas pressure values available, they need to be calculated pressures->o2 = get_o2(mix) / 1000.0 * amb_pressure; // These calculations are also used if the CCR calculation above.. |