ASW sonar system to undergo at-sea trials [CS19D1]

29 May 2019

Marine acoustics house GeoSpectrum Technologies is preparing to undertake new at-sea trials of its Towed Reelable Active Passive Sonar (TRAPS) antisubmarine warfare (ASW) sonar system in conjunction with the Royal Canadian Navy (RCN).

Trials from a Kingston-class coastal defence vessel are planned to take place off Halifax, Nova Scotia, in the coming weeks. These will be followed towards the end of 2019 by an evaluation of the system’s torpedo detection functionality at the Canadian Forces Maritime Experimental and Test Ranges facility in Nanoose Bay, off Vancouver Island. A first set of sea trials was performed from the Kingston-class coastal defence vessel HMCS Shawinigan in mid-2018.

GeoSpectrum, a wholly owned subsidiary of Elbit Systems (Booth 1421) based in Dartmouth, Nova Scotia, has developed TRAPS to meet requirements for a compact, lightweight and low-cost active/ passive variable depth sonar that can be accommodated on smaller ships. According to the company, the system is unique because it uses a 2kHz active sound source that operates as a vertical projector array, but stows on a single winch drum with the receive array and tow cable. This configuration allows for a single tow, thus negating the need for a complex launch and recovery system, and so reducing footprint weight and cost.

The containerised TRAPS system incorporates the sonar projector as well as the winch drum/ fairlead (supplied by Curtiss-Wright’s INDAL business), receive array and tow cable. An operator console can also be accommodated in the container to provide a fully self-contained capability.

A modified TRAPS package is being developed for deployment from unmanned surface vessels (USVs). The main change for USV TRAPS is a revised winch configuration, for which Curtiss- Wright INDAL is under contract.

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