Interesting. In Truk I saw people diving the San Francisco Maru (deck at 165fsw) on single AL-80's. Sure, the guides are slinging extra tanks and they stage some tanks at the tie-in, on the line, and there's a reg at 20' but holy cow... Some of these people should not have been doing ANY dive in Truk, much less 165fsw. The Odyssey's approach is "you are adults, here's the dive site... it's up to you to plan your dive - including whether to do the dive at all." They offered an earlie/shallow dive for anyone not wanting to do teh SFM, and one guy did take them up on that, but everyone else was going to dive "the money wreck" regardless.