sentences:  The third-batch S-class boats were fitted with either a Type 129AR or 138 ASDIC system and a Type 291 or 291W early-warning radar.HMS "Simoom" was a third-group S-class submarine and was ordered by the British Admiralty on 2 September 1940.She was laid down in the Cammell Laird Shipyard in Birkenhead on 14 July 1941 and launched on 12 October 1942.