RTM Ocean Duo sea kayaks, leading the way again with their Ocean Duo kayaks. Offering the ability to have one, two or three persons on board. The RTM ocean duo sea kayak is the most versatile sea kayak on the market at a very competitive price. The RTM Ocean Duo 1 or 2 Man Sit On Kayak . Ocean Duo Angler is available from H20 Sports with 0% Finance and fast shipping.