OVERVIEW: Depth charges are anti-submarine weapons designed to detonate underwater at predetermined depths to damage or destroy submerged submarines through shock waves and pressure effects. They are typically deployed by surface ships, aircraft, or helicopters.

DETAILS: A depth charge consists of a cylindrical metal casing filled with high explosives such as TNT or Torpex and uses hydrostatic fuzes or time-delay mechanisms to trigger detonation at a specific depth. Upon detonation, the rapid release of energy creates a powerful pressure wave that can rupture submarine hulls or damage critical systems even without a direct hit. Depth charges are deployed individually or in patterns to saturate an area where a submarine is believed to be operating. They are a staple of naval anti-submarine warfare, particularly in close-range engagements.

ROLE SUMMARY:
Category: Anti-Submarine Warfare Munition
Primary Use: Anti-submarine
Function: Underwater explosive detonation at preset depths
Strong Against: Submarines at shallow to medium depths
Weak Against: Deep-diving submarines, fast-moving subs, surface ships, evasive targets
Platform: Naval vessels, maritime patrol aircraft, ASW helicopters
Integration: Compatible with depth charge racks, throwers, and aerial dispensers

SOURCE:
Janes Naval Weapon Systems
https://en.wikipedia.org/wiki/Depth_charge