tro.vpos = -2.2;
if (dive->duration.seconds) {
double pressure = 1 + (dive->meandepth.mm / 10000.0);
double sac = airuse / pressure * 60 / dive->duration.seconds;
plot_text(gc, &tro, 0.98, 0.98, "SAC: %4.2f %s/min", sac, unit);
tro.vpos = -2.2;
if (dive->duration.seconds) {
double pressure = 1 + (dive->meandepth.mm / 10000.0);
double sac = airuse / pressure * 60 / dive->duration.seconds;
plot_text(gc, &tro, 0.98, 0.98, "SAC: %4.2f %s/min", sac, unit);