bandit_TX:I take it that my pictures look right, the best test there is, and I don't have to bracket the shots to get there. Wide angle works fine if there is a backdrop (reef). It doesn't work for blue water, of course it doesn't work very well on blue sky either. And changing aperature isn't always what you want. Sometimes wide open to reduce depth of field is what you want, then what? I guess you shoot a manual flash on land too.
And thats all that counts, if you think your pictures look right. Yes, in your case you need not bracket at all. I have yet to see any comments about opening up the aperture to blur out the background for U/W shooting (actually Chris Newbert suggested this on one of his clases). Some how most if not all new and older U/W photographers are stuck in this max. depth of field Nikonos mode. Yes I do use manual flash, metered by a Minolta flashmeter for my stuido equipment and aperture control on the portables.