Check out Shore Trips
Welcome to ShoreTrips® - Your Guide to Shore Excursions. I booked dives through them on my cruise to St Maarten this past Feb. Which cruise line and stops are you on?
My dives in St Maarten were with Scuba Fun Dive Center
Caribean Dive Center - Diving on St Martin - Scubafun Very well run operation. We left from just outside the cruise ship docking area. Note: This is the operation that Celebrity uses so you might be with a group from a ship (although I booked through Shore Trips, and you could book independantly). They did divide the 12-15 divers into managable groups, each with a DM, and did not have an obvious time limit to the dives. We made 2 dives - Carib Ghost (68ft) and Maze (53ft). I had a blast!