|ZOKA effectors are capable of
operating effectively against any torpedo threat that has acoustic homing
capability operating in active, passive or combined modes. Two types of ZOKA
effectors, jammers and decoys, are used in HIZIR-Torpedo Countermeasure System for
Surface Ships and ZARGANA-Torpedo Countermeasure System for
ZOKA jammers transmit wide band high-level
noise to saturate acoustic operating frequency bands of all existing torpedoes.
In this way, jammers mask the noise of submarines against passive torpedoes and
reduce the detection range of echo signals reflecting from the submarine by
increasing the noise level against active torpedoes.
ZOKA decoys deceive and confuse
the torpedo by simulating the acoustic and dynamic characteristics of the
platform and attract the torpedo to themselves. ZOKA
separate receive and transmit
sections. A hydrophone is towed from the stern of the decoy. Having separate receive and transmit units
allow decoy to perform noise generation and echo generation of torpedo active
pulses at the same time.
The combined use of ZOKA decoys
and jammers has been highly effective against acoustic torpedoes. ZOKA
effectors with various lengths have mobile capability in vertical and/or
horizontal plane and can be launched from surface ship launchers, submarine signal
ejectors and submarine outboard launchers.