Admiral Glass was a wooden-hulled ferryboat which was named for Admiral Henry Glass. It was constructed by the Mare Island Navy Yard (with which the late admiral had had much contact during the latter half of his career) and launched on 26 July 1916. Accepted and simultaneously placed in service on 22 August 1916, she spent almost a decade operating in the 12th Naval District. Records indicate that for a brief period in 1918 and 1919, Admiral Glass served at the Naval Training Station, Yerba Buena Island. On 17 July 1920, she was classified as a yard craft, YFB-2.