The Eagle class patrol craft were a set of steel ships smaller than destroyers but having a greater operational radius than the wooden-hulled, 110-foot (34 m) submarine chasers developed in 1917.

The submarine chasers’ range of about 900 miles (1,400 km) at a cruising speed of 10 knots (19 km/h) restricted their operations to off-shore anti-submarine work and denied them an open-ocean escort capability; their high consumption of gasoline and limited fuel storage were handicaps the Eagle class sought to remedy.
They were originally commissioned USS Eagle Boat No.1 (or 2,3..etc.) but this was changed to PE-1 (or 2,4.. etc.) in 1920. They never officially saw combat in World War I, but some were used during the Allied intervention in the Russian Civil War.[1] PE-19, 27, 32, 38, 48 and 55–57 survived to be used in World War II.[2]
Attention turned to building steel patrol vessels. In their construction, it was necessary to eliminate the established shipbuilding facilities as possible so…

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