Curious question - Why don’t we consider the local density altitude in diving? That is including temperature and pressure in the math?
all the agencies say we need to consider altitude effects when diving above 1000 feet. But that 1000 feet appears to assume standard day conditions. So diving on a warm day or day with lower than standard pressure (ex a low pressure front) would very likely put us over 1000 feet. So roughly 74 deg F is 1000 feet density altitude. 90 deg F is ~2100 feet. 90 deg and a typical local pressure of 29.5 in Hg is ~2800 ft. This suggests pretty much all warm weather diving is an altitude dive.
all the agencies say we need to consider altitude effects when diving above 1000 feet. But that 1000 feet appears to assume standard day conditions. So diving on a warm day or day with lower than standard pressure (ex a low pressure front) would very likely put us over 1000 feet. So roughly 74 deg F is 1000 feet density altitude. 90 deg F is ~2100 feet. 90 deg and a typical local pressure of 29.5 in Hg is ~2800 ft. This suggests pretty much all warm weather diving is an altitude dive.