Pardon me for being blunt, T., but are you nuts? You have no business taking such a small baby on such a difficult trip. It would be one thing if you lived in the islands and were just doing a day sail, but to drag your child on such a long trip is just asking for trouble. For one thing, a child that young CANNOT be exposed to that much sun! How are you planning to protect his/her skin? Even if you're sitting under a canopy, there is so much sun hitting your skin, even indirectly. Secondly, what about the feeding, the diapering, the sleeping issues caused by jetlag? You have your whole life ahead of you...do the right thing and either go without your child or wait until he/she is water-safe and can really enjoy the sailing! I'm the mother of 2 girls, 18 and 14, and I know what you're going through, so please take my advice in stride. They DO grow up, and you should plan appropriate trips at every juncture of their lives. By the way, I do think it would be O.K. to leave the baby at home if you have a trusted caregiver. He/she will be happier!