Adventure Smith Island at 3 Knots Marine of Smith Island offers charters, boat and kayak tours, and rentals for anyone wishing to explore our amazing island. We also offer transient slip spaces with a bath house for visiting mariners. Come out and experience smith island like you never have. Whether it's on our boat or yours, we've got you covered. Inclusive travel and tour packages to Smith Island as well. Boats to and from Smith Island. Eco tours available as well. Also offering cruises to, from, and around Smith Island. Want a Smith Island Cruise? We got you covered!