Marinco Y Shore Power Adapter 30A Boat to 30A Dock The Marinco Y Shore Power Adapter 30A Boat to 30A Dock allows you to split one dock side receptacle between two boat inlets of similar or different power configurations. Fully molded and equipped with the Marinco unique sealing collar and covers for use in wet locations. Product Features Equipped with covers and sealing collarswhere indicated. For use in wet locations. Boat side female connector attaches to boat inlet or cordset. Dock Side male