Fun Diver
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Walter:What a horrible attitude about education!
Read SCUBA Diving by Dennis Graver. It's the best text on diving currently available.
oops.. my remark looks a bit out of context there. It was more about reading off the board before the course, not books (responding to suggestion posted prior).. lots of debates here that would likely be confusing to someone starting out & having to follow an agencies practices. i.e. no sense giving their instructor a hard time about wearing a snorkel