Built in 1964 by the Todd Shipyard Corporation at Seattle, Washington as the Lorna M (hull #37) for the Honolulu Construction and Draying Company of Honolulu, Hawaii.

The tug was later acquired by Northland Services Incorporated of Seattle, Washington. Where she was renamed as the Polar Scout.

In 2013, Northland Services was acquired by Lynden Incorporated of Seattle, Washington and retained as a subsidiary operation. Where the tug retained her name.

In 2014, Northland Services was merged into the sister Lynden subsidiary, Alaska Marine Lines Incorporated. Where the tug retained her name.