USS Norfolk (DL-1)
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The second USS Norfolk (DL-1) was the first destroyer leader of the United States Navy. Originally projected as a hunter-killer cruiser, she was in service until 1970, and was scrapped in 1974.
USS Norfolk (DL-1) underway in the mid-1960s
3-inch/50-caliber gun
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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.
Mark 22 3"/50 cal gun
An early 3"/50 on USS Rambler (SP-211), 1918.
USS Pivot firing its forward 3"/50 caliber gun.
3"/50 caliber gun aboard USS Slater.