India’s Ministry of Defence (MoD) is looking to Germany’s Atlas Elektronik to supply heavyweight SeaHake torpedoes for the Indian Navy’s six Project 75 French licence-built Scorpene submarines, the first of which is scheduled for commissioning by the end of 2016.
The MoD turned to the firm after it terminated the contract for 98 Black Shark torpedoes from Whitehead Alenia Sistemi Subacquei (WASS). This followed the MoD’s decision to terminate all ongoing contracts with Italy’s Leonardo-Finmeccanica – of which WASS is a subsidiary – for alleged wrongdoing in the 2010 import of 12 AW101 helicopters from AgustaWestland, another of its companies.
India’s New Submarines Have No Real Weapon – Courtesy Agusta Scam – Details of torpedo
DM2A4 “SeaHake mod 4”
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.
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 up to four silver zinc 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.
The high-frequency permanent-magnet AC motor of the SEAHAKE DM2A4 HWT provides a 50% increase in maximum speed and a 400% increase in energy content compared with the DM2A3 while the weapon is 50% quieter. @nafomag.com
The weapon is armed with a 260 kg PBX, (RDX–aluminium) warhead (equivalent to 460 kg of TNT) with magneticinfluence and contact fuzes. The charge and fuse are insensitive and electromagnetic pulse safe.