Entry into the water is with a Giant Stride off the dive platform at the rear of the boat. Our first day on board we had 1 to 2 foot waves which made for a very bumpy ride. Even my kids, ages 16 and 18, who have boasted that they never get sea sick managed to feed the fish this time. Take one the night before and then one the morning of the dive. If the seas had been any worse they would have canceled the trip.
Night dives are usually available on the weekend if they can get a minimum of six divers.
During our trip we managed to go on two night dives. Tavernier Dive Center is very accommodating and flexible. They usually ask the divers where they would like to go and if there aren't any suggestions they find out where you have been diving so they can find you a different dive site. Once a few of the divers requested a three tank dive just before leaving the dock, and after checking with the rest of the divers they loaded a few more tanks and off we went on a nice three tank dive trip. They require a minimum of six divers for a night dive.