3-inch/23-caliber gun
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The 3-inch/23-caliber gun was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. United States naval gun terminology indicates the gun fired a projectile 3
A 3"/23-caliber gun being fired aboard the United States Navy submarine chaser USS SC-291 sometime between 1918 and 1920.
Plan and left elevation diagrams
The SC-497-class submarine chasers were a class of 438 submarine chasers built primarily for the United States Navy from 1941–1944. The SC-497s were based on the experimental submarine chaser, USS SC-
3-inch/23-caliber gun
…SC-1-class submarine chasers SC-497-class submarine chasers Wickes-class destroyers…
USS SC-661
Soviet Northern Fleet naval infantrymen are on board SC-497-class submarine chasers during the Petsamo–Kirkenes offensive, 1944; BO-220 (ex–USS SC-1490) is in the foreground