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  • Core Business - Underwater Acoustics

CMS - CANTASS Mission Simulator

Canadian Navy’s principal passive long-range sonar and incorporates the US Navy’s AN/SQR-19 towed array

Each CMS has up to four Student Stations and two Instructor Stations

Sonar Acoustic Research and Development Software

The Canadian Towed Array Sonar System (CANTASS) Mission Simulator (CMS) is an advanced, high fidelity system for training CANTASS AN/SQR 502 Shipboard Electronics Sub-System (SESS) operators. CANTASS is the Canadian Navy's principal passive long-range sonar and incorporates the US Navy's AN/SQR-19 towed array.

The first CMS was commissioned in March 2000, the CMS Atlantic, and is installed in the training facility at the Canadian Forces Naval Operations School (CFNOS), in Halifax, NS. A second CMS for the Pacific coast was developed by Array and commissioned in October 2002. It is installed in the training facility at the Canadian Forces Fleet School (CFFS) in Esquimalt, BC. Both are currently in use at the respective naval bases.

The Student Stations replicate the functionality and performance of the on-board sonar equipment. The Instructor Stations stimulate the four Student Stations by generating and transmitting up to four independent streams of raw acoustic data.

The CMS simulates a complex ocean environment. This model includes multi-path effects caused by space and sound velocity profiles that vary with time. Each mission may include a wide range of components:

  • Up to three propagation loss curves and ambient noise profiles
  • Up to sixteen complex targets with up to 150 NB and 15 BB tonals per target
  • Up to 1500 NB and 150 BB components
  • Full and realistic ambient noises and complex radiated noises, including active sonar
  • Taped acoustic sounds

The mission profile, either off-line or during the mission simulation, can incorporate full state dependencies and state changes. These may include helm changes, diesel to battery changeovers, or automatic weapons release within preset counter detection ranges. The simulation makes use of a chain link model for the towed array to provide realistic dynamic performance.

The instructor defines a mission simulation on the CMS using a set of script commands through a Graphical User Interface (GUI). While the CMS is executing the mission simulation, the instructor uses a local monitor to view subsets of the 16 Acoustic Screen Monitors from the four Student Stations. The instructor can also communicate with the students over an audio network.

The CMS also interfaces with a Sony DIR-1000 High Density Digital Recorder (HDDR). Simulated missions created on the CMS can be recorded on HDDR tapes, archived, then used for playback to the Student Stations (or to ship-board systems) at a later time. Moreover, the CMS can use acoustic data tapes from ships and other sources to stimulate the Student Stations.