She was placed in service soon thereafter, probably later in August or in September 1914, as USS Tillamook (Tug No.

Tillamook steamed south to San Francisco, California, and reported to the Commandant, 12th Naval District, for duty at Mare Island Navy Yard in Vallejo, California.

On 17 July 1920, when the Navy adopted the modern system of alpha-numeric hull designations, she was classified as a fleet tug and redesignated AT-16.

She received her final classification, as a medium harbor tug, on 13 April 1944 and was redesignated YTM-122.

Tillamook was placed out of service and turned over to the Maritime Commission for disposal on 28 April 1947.