American self-propelled seaplane wrecking derrick YSD20 in 1945

Dimensions 104.0 x 31.2 feet. Superior Diesel. Horsepower 400shp. Crane capacity 10 tons. Allocation 10th district. Built by Navy Yard, Boston in 1940-1941.

Source

Bureau of Ship. Navy Department. Ships’ Data US Naval Vessels. Vol III. Auxiliary, district craft and unclassified vessels, 15 April 1945