On Sun, Jul 5, 2015 at 2:42 PM, Dirk Hohndel <dirk at hohndel.org> wrote: > > So rounding to 5m seems wrong - the typical stop depth are multiples of > 3m/10ft. Are they, though? At shallow depths, sure. But do metric divers really prefer "21m/24m" to "20m/25m"? That sounds odd. But I've never done any metric diving, so.. Linus