CCGS John P. Tully[note 1] is an offshore oceanographic science vessel in the Canadian Coast Guard operating out of Pacific Region at CGS Base Patricia Bay in Sidney, British Columbia.

[1][2][3] The ship has two Deutz 628 geared diesel engines powering three Caterpillar C18 generators driving one controllable-pitch propeller and stern and bow thrusters creating 2,757 kilowatts (3,697 hp).

[4][5] The ship can operate one light helicopter of the MBB Bo 105 or Bell 206L types from the flight deck but is not equipped with a hangar for storage.

[6] The research vessel was named for the oceanographer John P. Tully and is based at the Institute of Ocean Sciences at Sidney, British Columbia.

[1] John P. Tully has been employed on joint research voyages with a variety of United States agencies, including the National Oceanic and Atmospheric Administration.