Some of the ports had opportunities to do a two tank dive in the morning and then again in the afternoon, sometimes a two tank, and sometimes a one tank dive. I usually did the morning dives, and then sometimes did the touristy stuff in the PM, especially on Moorea and Bora Bora, because we were there for two days each, and are beautiful islands to drive around. Our cruise did not go to Fakarava or Rangiora, which probably has the better dives, but I did not dislike any of our dives. We did the 11night Cook and Society Islands itinerary, and if you go to their website and pull up the itinerary, or any itinerary, you can see what shore excursions are available at each port. You will likely have questions about the diving specifics after reading the FAQ, and if you call the folks at Paul Gauguin, they can give you the email address and name of the Dive Director. I found his responses to be very timely and helpful. You will book all of your dives, and other shore excursions, using the ship's vendors directly on their website once you actually book the cruise, and making changes to your shore excursions was easy on the website as well. You can also book dives with off-ship vendors, but I did not see how the dives could have been improved, perhaps a bit cheaper, but for us, the convenience of diving from the ship and the care they gave my gear was worth every penny. As Ontwreckdiver stated, there is a dive section on the website, and you need to read that very thoroughly, and do what they tell you to do. We took our own gear, but the ship's dive gear was in excellent condition. If you are scheduled for a dive, your gear will be set up and waiting on the RIB. All you have to do is show up, don wetsuit, grab mask and fins and get in the RIB after the dive briefing.All the dive gear is secured in their dive operation area, and they take very good care of everything. Their tanks are set up for yoke rather than DIN. The cruise itself was outstanding, with excellent food (don't miss the moon fish if it is available on your cruise), comfortable cabins, and a wonderful crew. I would not hesitate to cruise on PG in the future.