The Auk class were a class of minesweepers serving with the United States Navy and the Royal Navy during the Second World War. In total, there were 93 Auks built.

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.