MV John Hamilton Gray was an icebreaking railway, vehicle, and passenger ferry which operated across the Abegweit Passage of Northumberland Strait, connecting Port Borden to Cape Tormentine between 1968–1997.

Beginning in May 1972, John Hamilton Gray was used during the peak travel season on CN's Cabot Strait services from North Sydney to Channel-Port aux Basques and Argentia.

John Hamilton Gray departed the Northumberland Strait for the final time on April 28, 1997, when she headed to Point Edward, Nova Scotia for disposal.

John Hamilton Gray was sold in July 1997 at Point Edward by the Government of Canada's Crown Assets Division to Contessa International, a casino cruise company in the United States.

The vessel was overhauled at a shipyard in Les Méchins, Quebec, and departed for West Palm Beach, Florida, in November, no longer a ferry but a casino cruise ship.