noj3333
Contributor
I'm also wondering if Nitrox is worth it for the wrecks if I'm with the Rainbow Reef guided groups. If we're limited by the lowest NDL (or air supply) diver in the group, it would presumably only help if everyone in the group is diving nitrox. Is that usually the case?
Again from memory, as the reef/ shallow dive winds down the DM will lead you back to the boat, you're then free to swim around 'under' the boat, enjoying the last minutes of your dive. People short on air can simply begin their safety stop and surface when they're ready to call their dive. They're also pretty firm on the time limit's set by the captain, so keep in mind no matter how much air you have left, you won't see a 'super long dive' with their boats...