ASELSAN will provide jammers and decoys for Indonesia's submarines to protect vessel by deception against hostile torpedoes.

Turkish defence electronics company ASELSAN is supplying its ZOKA range of acoustic torpedo countermeasure jammers and decoys for the Indonesian Navy's (Tentara Nasional Indonesia – Angkatan Laut, or TNI-AL's) submarines.

The ZOKA line of effectors consists of jammers and acoustic decoys that can operate in active, passive, and combined modes. The jammers emit noises that have been designed to saturate the acoustic operating frequencies of known torpedoes, thus masking its host submarine's movements from hostile munitions.

Meanwhile, its decoys can be programmed to simulate the acoustic and hydrographic characteristics of its host submarine, with the aim of deceiving and leading away torpedoes that may have locked on to the boat. These acoustic and hydrographic characteristics can be customised specifically to match those of the host submarine.