Bring your bathing suit and clothing that will provide ample sun protection. The key is not to over pack. All your linens and towels are provided. He is also a first-class sailing instructor with a lot of patience with adults as well as children. The sun in the tropics is certainly stronger than most other places in the United States.
Oil is difficult to remove from the decks and cushions and makes life slippery.
Highly recommended is a long sleeve shirt to snorkel in to protect your back and arms. Better yet, is a nylon dive shirt. These not only keep you warm if the water is cool, but also provide great sun protection. Dive shops sell them to be worn under a wet suit for rash protection. Leave expensive jewelry at home.