Christi:Cruise ships do not support the diving economy by the way...land-based divers do.
Thats an interesting bit of info. I trained a nurse to dive that spent 6 months with Norwegian and did cruise to Coz on a weekly basis. The passengers that went diving had made prior arrangements with dive ops at the islands they we stopping at.
If they wanted,the dives could be booked through the cruise line at a premium price.(A girl I just finished teaching planned her trip that way.) Arrangements would then be made through a local dive op and commission was paid to the dive op the cruise line had connections with.
There are others,such as a couple of my friends, that take an annual honeymoon cruise. They manage to dive in all locations they dock in and usually make arrangements by asking for referals from pier employees or previous research.
Ron