On Sun, Jul 05, 2015 at 11:25:41PM +0100, David Tillotson wrote: > The BSAC 88 tables work in 3m increments, as do the tables that ScotSAC > use IIRC. I guess most are a result of the original USN work. Good data points. Is anyone aware of an organisation that teaches deco stops that aren't on multiples of 3m/10ft? /D