One full day of diving, actually. How much water time is needed for the average nitrox cert? Classroom times are another story... and are not shorted in any way. The bulk of the open water session day is spent on drysuit drills and finally, the wreck itself.gcbryan:~snip~
Going on one dive to get 3 three certificates just sounds like certificate collecting to me.
No cert collecting, with the possible exception of the wreck cert, which, while non-essential, is certainly a good thing to have before diving wrecks with no prior experience, wouldn't you agree? And I consider Nitrox to be essential, especially when training as a DM, and being a cold water diver, the dry suit class is equally essential. Saving travel and boat fees is just smart. So accusations of cert collecting are a bit overreaching.