dvankirk
Contributor
You have gotten great advise above..well most of it. Let me give you some suggestions and tips.
Plan on staying more than a few days. As yardpro stated, it is not uncommon for us to not dive due to water conditions so having just a few must dive days may well end up in no diving at all. Trust me, if our captains don't want to go you for sure don't want to. You also need to book early, it is not uncommon for our weekend charters to fill up months in advance.
You need to understand some about our diving. Too many "experienced" divers come to us with all their expereince in Fla or the Caribbean and expect those conditions and diving style. They often end up with a "bad" experience. Our wrecks tend to be in deeper water and a long way off shore. 100ft + dives, 2 or 3 hrs boat ride off shore in 4 or 5 ft seas are the norm, with rare exception there are no 15 minute rides on glass slick water to a 30 ft wreck. Unlike most places, divers here are pretty much on their own, there is no hand holding, no DMs in the water or tank monkies hauling your gear.
If you are not nitrox certified, get the cert and rent larger tanks. Since our wrecks are deep it's always nice to have the extra gas, you spent a lot and come a long way, get the most bottom time you can. A pony bottle is not a bad idea either. Adding seasick meds to your dive kit is also a good idea. Nothing worse than being a lovely shade of green of a boat for 6 or more hours.
Some safety gear you need to add if you do not already have it. A large SMB with a finger spool or reel. We dive in the open ocean a long way from shore and if you must do a free accent, a not uncommon occurance, you need a way to signal the boat in those 5 ft seas. Understand that if you do come up away from the boat, it can not just come get you. It must wait until the other divers are on board before coming for you. You may be floating for a while and the larger the SMB the easier you are to see.
We have some of the greatest diving in the world but to enjoy it you need to be prepaired. If you expect glass slick water and dive butlers you will be dissapointed but if you come prepaired you will see huge schools of fish, great wrecks and most likely swim very close to large sand tiger sharks.
Well said.