DM2A4 Seehecht Sea Hake heavy weight torpedo 21" 533 mm HWT

Submarine Weapon System
Atlas Elektronik DM2A4 Seehecht (Sea Hake)

dm2a4 seehecht sea hake heavy weight torpedo hwt attack submarine ssk navy 04

02/24

DM2A4 Seehecht (export designation "SeaHake mod 4") is the latest heavyweight torpedo developed by Atlas Elektronik for the German Navy, as a further update of DM2 (Deutsches Modell 2) torpedo which was released in 1976.

Being the successor of the DM2A3, it features an advanced electrical propulsion system and a fiber-optic cable for torpedo guidance and communication, which, in conjunction with advanced signals processing and mission logic, makes the torpedo largely countermeasure resistant. The DM2A4/SeaHake mod 4 is the first torpedo ever to be guided by a fiber optic wire. With a fully digital system architecture, increased range and speed and its new conformal array sonar with a very wide panoramic sensor angle as well as the additional wake homing sensor, the DM2A4/SeaHake mod 4 provides greatly advanced performance over its predecessor. The homing head shell is a hydrodynamic optimised parabolic shape which aims to reduce torpedo self-noise and cavitation to an absolute minimum. The homing head's conformal transducer array permits detection angles of +/-100° in the horizontal and +/-24° in the vertical, therefore supporting larger acquisition angles in comparison to traditional flat arrays. The wide angle array is designed to reduce maneuvering when in search and reconnaissance stages, therefore also reducing self-noise and preserving battery power.

The weapon has a modular design that includes 2-4 silver-zinc oxide battery modules and is able to achieve a range of more than 50 km (27 nmi) and a speed exceeding 92.6 km/h (50 kn) powered by a high frequency permanent magnet motor, with a closed-loop cooling system independent from the environment. Exact performance data are classified. The torpedo design template may also be used as the basis for Remote Operated Underwater Vehicles. The weapon is armed with a 260 kg PBX (RDX-aluminium) warhead (equivalent to 460 kg of TNT) with magnetic influence and contact fuzes. The charge and fuse are insensitive and electromagnetic pulse safe.

The weapon has a length of 6.6 m when configured with 4 battery modules, and is respectively shorter when configured with either 3 or 2 battery modules depending upon the requirement of the operating unit. Diameter of the unit is 533 mm.

Specifications:
Type: submarine launched heavy-weight torpedo
Manufacturer: Atlas Elektronik, Bremen, Germany
Diameter: 21 in (533 mm)
Length: 6.6 meters (22 feet)
Weight: 1530 kg (3373 lbs)
Range: 27 NMI / 50 km, max.
Speed: 50 knots, max. (93 km/h)
Propulsion: Electric; silver-zinc oxide batteries
Guidance System: wire-guided; from full autonomous to full manual
Homing: active, passive + combined acoustic homing. intercept homing and wake homing
Warhead: 260 kg (573 lb) Polymer-bonded explosive (PBX)
Detonation mechanism: proximity or contact detonation
Fuse: Impact and inductive proximity fuse, independent from sea state
In service: 2004 - present

source: wikipedia + Atlas Elektronik

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