US destroyers practice dropping depth charges

The video tutorial covers the practice of deploying depth bombs in rough seas, highlighting the challenging conditions created by Old King Neptune. It describes the destroyer's speed and the process of deploying 300-pound TNT bombs overboard. The tutorial explains how water pressure triggers the bombs to explode at a fixed depth, emphasizing the potential impact on submarines.

What is the purpose of the bombs being dropped overboard?

What might be the consequences of the bombs exploding at a fixed depth?