At Your Service As a full service marina, our maintenance and repair facilities are operational throughout the year. Our experienced staff can help. Learn more. 2015 Summer Slip Join us for the upcoming boating season. With direct access to Lake St. Clair, JBM is your gateway to unlimited marine recreation and open water boating. Transient Boaters Walking distance to Nautical MIle restaurants, shops and attractions, JBM is a destination within a destination.