The Surveillance Systems Group (SSG)  of Wescan Systems Limited (under its former ownership as Northrop Grumman-Canada, Ltd. and Westinghouse Canada Inc.) has long been a supplier of sophisticated defence products to the Canadian Dept of National Defence, Defence R&D Atlantic (DRDC), the UK MOD and most of the NATO alliance countries. 
Today, our focus is on Sonar Technologies. Current significant programs include the WIPA Sonar System (Wideband Interstitial Passive Array) for the UK MOD Type 23 Frigate as well as the MANTArray Passive Sonar Towed Array in support of the TIAPS program for DRDC. Wescan co-developed the RDS (Resolved Directional Sensor for DRDC which is also being deployed for use with TIAPS.

Wescan Systems Limited continues to support its broad Customer base for the 505 Sonar System including the (CPF) CANEWS Electronic Data Transfer Unit, Radiation Control Unit (RCU) and Navigational Switch Board (NSB). Wescan Systems Limited manufactured and supplied all of the ASR-9 (ATC) and Nexrad (Weather) Radar Transmitters currently deployed throughout the US with the FAA and National Weather Service.