just got off a carnival cruise and went to Grand Cayman and Dove there. it is beautiful. The ship two tank dive sold out quickly and so my girlfriend and I did not get to do the boat dive but we did a certified shore dive and it was fun. only about 52 feet but was very nice. The cruise ship uses Don Foster for their excursions and the crew is very good. Their gear looked ok but we used our own. I would at least bring a regulator if you have one just so you know it is serviced the way you want it. If you have one. Have Fun... We Did.