I'm going to go out on a limb as well. The best bet for novice cruise ship divers is Dive with Martin. They are on the Cruise ship pier, there is no need for a taxi and they are reputable and set up for cruisers. You will have no chance of going to the wrong dock or pier, miss the office or suffer many of the self inflicted wrongs.
Dave Dillehay
Aldora Divers
Dave Dillehay
Aldora Divers