We're at sea now until the summer, deployed as the atlantic patrol ship.

Satellites could see but not identify the vessel, meaning that a patrol ship was needed.

In 1965, the corvette was refitted as a training and fisheries patrol ship to replace the frigate.

The determined weather patrol ship fired 20 rounds, one of which struck close aboard the fleeing sub's conning tower.

That close working relationship might be transferred to the offshore patrol ships.