OVERVIEW: The Floating Contact Mine is a buoyant surface-deployed naval mine designed to damage or sink surface vessels upon physical contact. It relies on contact-sensitive fuzes to trigger detonation when struck by a ship’s hull.

DETAILS: Floating contact mines consist of a steel casing filled with high explosive and fitted with protruding chemical or mechanical contact horns. These horns activate the detonator when bent or crushed on contact with a ship. Deployed to float just below or at the water surface, they are generally tethered to an anchor system to maintain depth but may also be untethered in drifting configurations. First used extensively during World War I, these mines were effective for area denial and maritime blockade. They are highly visible and pose persistent hazards if not cleared. While now largely replaced by more advanced influence mines, floating contact mines are still used in asymmetric naval warfare or by smaller forces due to their low cost and simplicity.

FUNCTION: Once deployed, the mine floats in position and detonates upon contact with a vessel’s hull, causing structural damage or destruction. The system relies on direct physical impact to trigger the charge.

NOTE:
IOC: 1908 (Russian and German operational deployment)
Operators: Russia, China, North Korea, Iran, historical use by UK, Germany, USA
Platforms: Surface ships, small boats, aircraft
Conflict used in: World War I (1914–1918), World War II (1939–1945), Korean War, Iran–Iraq War, Gulf War (1991)

SOURCE: U.S. Navy Mine Warfare Manual ; International Mine Warfare Handbook ; Naval Mine Warfare: Politics to Practicalities ; Jane’s Mines and Mine Clearance ; https://www.navy.mil ; https://www.janes.com