OVERVIEW: The Mk105 is a helicopter-towed magnetic influence mine sweep system designed to trigger magnetic-fuzed naval mines. It simulates the magnetic signature of surface vessels to detonate mines at a safe standoff distance.

DETAILS: The Mk105 consists of a hydrofoil-equipped sled towed behind a helicopter, typically the MH-53E Sea Dragon. The sled houses magnetic field generators powered by a towed cable, creating ship-like magnetic fields capable of activating magnetic mine fuzes. Originally developed in the 1970s and adapted for AMCM use in the early 1980s, the system became part of the U.S. Navy’s layered airborne mine countermeasure suite, alongside Mk103 and Mk104 systems. The Mk105 sled is constructed of non-magnetic materials and designed to skim the water surface during towing. It can be used alone or in combination with acoustic and mechanical sweep systems.

FUNCTION: During deployment, the MH-53E tows the Mk105 sled at a controlled speed over suspected minefields. The magnetic field induces detonation in influence mines, neutralizing them without requiring direct contact.

NOTE:
IOC: Early 1970s
Operators: United States Navy
Platforms: MH-53E Sea Dragon
Conflict used in: Operational mine clearance and training missions; no confirmed combat use

SOURCE: US Navy Mine Warfare Manual ; Naval Air Systems Command technical publications ; GlobalSecurity.org airborne MCM systems ; Designation-Systems.net Mk105 entry