Sepandee
Contributor
Tomorrow I'm off to Barbados for some diving. I'm going to so the Rescue Diver course, but before I do that, I'd like to refresh what I learned from my open water course. does anyone know a link to a good website with FREE basic instructions that were covered by the OW course (even if it's just partial information)? e.g. how to read from a table, atm. pressure under the water, what to do in a current, underwater signals, etc.?