What to bring or wear: A sea breeze (over colder water) can cool the air more than you may expect. In addition to sunglasses, a hat, sunscreen, and any other desired sun protection, pack a jacket or windbreaker that can keep you comfortable in 10 degrees less than you may wear on land. A water bottle and power bar/ snack sometimes come in handy, too. Generally, you'll want to wear non-skid close-toed shoes/ sneakers. The boats have numerous "things" on deck that are virtually designed to stub toes.