The AN/WLY-1 acoustic interception and countermeasures system, provides the Ohio-class submarines with an automatic response against torpedo attack. The AN/WLY-1 system is being evaluated as a replacement for the existing AN/WLR-9/12/17 acoustic intercept system used on the SSN-688 Los Angeles class attack submarines, SSN 21, and NSSN class submarines. This project develops a Submarine Defensive Warfare System (SDWS) to improve the effectiveness and survivability of all classes of US submarines. Project efforts consist of a new acoustic threat intercept system (AN/WLY-1) that will have threat platform sonar and torpedo recognition capability for early detection, classification, and tracking of threats. It will allow radius of curvature and multipath ranging. The system will also include a control subsystem for launch management of all onboard countermeasure devices and launchers.
On 04 February 1999 Northrop Grumman Norden Systems of Melville NY, was awarded a $5,773,328 firm-fixed-price contract for two AN/WLY-1 low rate initial production systems, technical data, and other related items.
Next Generation Countermeasure (NGCM) including Weapons Analysis Facility (WAF) simulation analysis capability provides the US Navy with testing of hardware and software within detailed representations of acoustic environments. NGCM concepts include offensive/defensive capabilities against threat submarines and torpedoes.
Another possible future concept is the Submarine Littoral Warfare Missile (SLWM), which provides threat neutralization of small aircraft, helicopters and small, fast patrol crafts in littoral areas.
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