Germany World War 2 U Boat Submarine Recovery Real Photo Postcard

Depth charges served as a primary anti-submarine weapon during both World War I and, more extensively, World War II. These barrel-shaped explosives were designed to be launched from surface vessels and detonate at a pre-set depth, creating a powerful hydrostatic shockwave intended to crush the pressure hull of a submerged submarine. They were typically deployed from the stern of escort ships like destroyers, frigates, and corvettes, or fired from K-gun projectors mounted on the ship's sides.