diff options
| -rw-r--r-- | dive.c | 8 |
1 files changed, 6 insertions, 2 deletions
@@ -1637,8 +1637,12 @@ extern void fill_pressures(struct gas_pressures *pressures, const double amb_pre pressures->n2 = pressures->he = 0.0; } else { pressures->o2 = po2; - pressures->he = (amb_pressure - pressures->o2) * (double)get_he(mix) / (1000 - get_o2(mix)); - pressures->n2 = amb_pressure - pressures->o2 - pressures->he; + if (get_o2(mix) == 1000) { + pressures->he = pressures->n2 = 0; + } else { + pressures->he = (amb_pressure - pressures->o2) * (double)get_he(mix) / (1000 - get_o2(mix)); + pressures->n2 = amb_pressure - pressures->o2 - pressures->he; + } } } 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.. |