OVERVIEW: The DM2A3 Seehecht is a German heavyweight, submarine-launched, wire-guided acoustic torpedo introduced in 1991. It was developed for both anti-submarine and anti-ship roles in deep and shallow water environments.

DETAILS: The designation “DM2A3” refers to the third advanced model of the German DM2 torpedo family, while “Seehecht” translates to “Seahake.” Developed by STN Atlas Elektronik as a replacement for the earlier DM2A1, the DM2A3 introduced fully digital guidance systems, improved acoustic processing, and a modular architecture. It features a 533 mm diameter, silver-zinc battery-powered electric propulsion, contra-rotating propellers, and a warhead of approximately 260 kg. The torpedo uses wire guidance during its mid-course phase, switching to either active or passive acoustic homing in the terminal phase. It is capable of engaging submarines or surface vessels at ranges up to 28 km, with variable speeds between 22 and 35 knots.

TYPE: Heavyweight wire-guided acoustic torpedo

FUNCTION: Launched from a submarine, the DM2A3 is guided toward the target area via fiber-optic cable, then autonomously homes in using its acoustic seeker. It engages enemy submarines or surface ships, detonating on contact or via proximity fuze.

NOTE:
IOC: 1991 (DM2A3 Seehecht)
Operators: Germany, Colombia
Manufacturer: STN Atlas Elektronik, Germany
Platforms: Type 206, Type 209 submarines
Conflict used in: No confirmed combat use

SOURCE:
Jane’s Underwater Warfare Systems ; Federation of American Scientists (FAS): https://fas.org/man/dod-101/sys/ship/weaps/index.html ; Naval Institute Guide to World Naval Weapon Systems ; WeaponsSystems.net: https://www.weaponsystems.net/system/1140-DM2A3+Seahake ; SIPRI Arms Transfers Database: https://armstrade.sipri.org
