The 3"/50 caliber gun in United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm) in diameter, and the barrel was 50 calibers long. Different guns of this caliber were used by the U.S. Navy and U.S. Coast Guard from 1900 through to 1990 on a variety of combatant and transport ship classes.

The Bainbridge-class destroyers were a class of United States Navy Torpedo Boat Destroyers (TBDs) built between 1899 and 1903. The first class so designated, they comprised the first 13 of 16 TBDs authorized by Congress in 1898 following the Spanish–American War(the remaining three authorised comprised the Truxtun-class destroyers). One ship of the class was lost at sea during service in World War I: Chauncey, which collided with the British merchant ship SS Rose in 1917. The balance were decommissioned in 1919 and sold postwar in 1920, eleven to Joseph G. Hitner of Philadelphia, and the Hopkins to the Denton Shore Lumber Company in Tampa, Florida.