There are many options on sxm for a boat cruise and I am sure you will get lots of responses I always plan a boat day when going to sxm as it is always a great day I have sailed with Ian Martin probably 15 times over the years and it is always a great time.. look up stmaartencharter.com on line or on facebook adventure sports sailing I believe it is. He has all types of cruises and the food is great, the crew is fantastic, the boat is very comfortable, music, sailing fishing snorkeling .. all adds up to a great day