Precision Marine began in 1985 when Cork Martusewicz bought Northern Propeller on Bay Street in Cape Vincent. In 1992, Precision Marine moved to the beautiful St. Lawrence River at Peos Bay. Precision Marine incorporated as Precision Marine at Peos Bay, Inc. in 2003. What began as a little prop shop has grown over 34 years to a full service marina offering personable, individualized attention to boat owners.

    Located directly across from the northern end of Carleton Island, Precision Marine at Peos Bay has a launch ramp, dockage, customer bathroom and shower, and parking.