American seaplane wrecking derrick (YSD) 4 on 1 July 1920

Self-propelled, dimensions 87.3 x 40.0 feet, capacity 5 tons, steel built, allocation 2th district and built on the navy yard Mare Island in 1920. Stern wheel.

Source

Navy Department. Ships’ Data U.S. Naval Vessels. 1 July 1920.