The DAC has also approved AON for nine Active Towed Array Sonar
Systems (Advance) for the Indian Navy which will cost Rs 450 crore.
Advanced air/surface search radar, electro-optical sensors, and hull-mounted sonar, would be pre-requisites on a baseline design, with additional modular sensors such as active towed array sonar
for example, installed as and when required.
Ultra Electronics of Dartmouth, Nova Scotia, which has had success with its multi-static active passive towed array sonar
, would provide a special towed body that is well suited to the congested shipping lanes and littorals in which modern threats might lurk.
Another area of concern is the missing Active Towed Array Sonar
( ATAS), which
Some of the new equipment under consideration include: an improved 3D air surveillance radar, improved electronic warfare and signature management systems, a multi-function towed array sonar
system, 25 mm guns, torpedo defense systems and armor.
These include the DCNS Subtics integrated combat system with a communications suite based on Thales new-generation systems, a Sagem Series 30 surveillance optronics mast, Series 20 attack periscope and Series 10 CSR navigation radar mast, a Thales S-Cube integrated and modular submarine sonar suite with planar flank array sonar
and Earl Communication ESM.
Decommissioned in 1994, Fraser was one of the first warships to be designed and built in Canada, and was the first ship to test the beartrap helicopter recovery system, the towed array sonar
, and the nixie torpedo decoy system.
Also aboard will be an EDO variable depth low frequency towed array sonar
Testing of the Surveillance Towed Array Sonar
System -- Low Frequency Active (SURTASS-LFA) acoustic sonar system has already begun to wreak havoc in the world's oceans.
During anti-submarine maneuvers, the Visby's crew can deploy a towed array sonar
, basically, a series of pressure sensors with preamplification and digitizing electronics embedded in an oil-filled hose about two inches in diameter.
The project, called the Surveillance Towed Array Sonar
System Low Frequency Active acoustic sonar system (SURTASS LFA), is designed to take advantage of the special acoustic properties of high-decibel, low frequency sound in seawater to detect what the Navy claims are increasingly quiet foreign submarines.
Other electronic systems acquired to upgrade the vessels' capabilities include Thomson-CSFs DR 3000 electronic support measures system and a Thomson-Sintra/British Aerospace SEMA active towed array sonar