SeaHake : The German Torpedo
At the Euronaval show in October 2016, senior Atlas Elektronik executive Wolfgang Klose informed this Vayu correspondent that the DM2A4 Seehecht (export name: SeaHake mod4), the main underwater weapon of the German Navy’s Type 212 submarines, has been proposed as a ‘Make in India’ initiative. The heavyweight torpedo, weighing 1.37 tonnes, can be launched from both submarines and surface ships. The weapon is 6.6 m long when configured with 4 battery modules, and is respectively shorter when configured withh either 3 or 2 battery modules, while diameter remains constant at the standard 533 mm.
Developed by Atlas Elektronik, the SeaHake mod4 torpedo employs fibre optic wire guidance in conjunction with advancedd signals processing and mission logic to accuratelyately engage underwater and above-water targets, and d carries a 255 kg PBX warhead with magnetic influenceuence and contact fuses. The torpedo is equipped with a high frequency permanent magnet motor (with a closed-loopop cooling system independent from the environment) and silver zinc inc battery modules ensuring a maximum speed of 50 knots and a rangeange of over 50 km.
With a fully digital system architecture, increased ncreased range and speed and its new conformal array sonar with a very wide panoramic sensor angle as well as the additional wake-homing homing sensor, the DM2A4/SeaHake mod 4 provides greatly advanced vanced performance over its predecessor. The homing head shell is s of hydrodynamic optimised parabolic shape, which aims to reduce educe torpedo selfnoise and cavitation to an absolute minimum. The homing head’s conformal transducer array permits detection angles of ±100 degrees in the horizontal and ±24 degrees in the vertical, therefore supporting larger acquisition angles in comparison to traditional flat arrays. The wide angle array is designed to reduce manoeuvring when in search and reconnaissance stages, therefore also reducing self-noise and preserving battery power.
Meanwhile, Atlas Elektronik have developed the SeaHake mod4 ER version that along with Global Positioning System (GPS) guidance and Satellite Communication (SATCOM) with signals received through a mini periscope, enables the torpedo to
attain a range of 140 km.