Like netdoc, above and beyond my general dive related expectations of boat and crew, I want a cheerful experience. If the crew is in a good mood and/or full of humor, I'm likely to tip more.
OP has to tell me where he/she is going and what kind of service before I can say what think is acceptable tip amount.
OP has to tell me where he/she is going and what kind of service before I can say what think is acceptable tip amount.