From 1st March 1975 to June 1981, No. 35 Squadron was tasked with performing Maritime Radar Reconnaissance in support of No. 27 Squadron.
Vulcan aircraft, flying at medium altitude, were utilised to scan large areas of the sea, with the aim of identifying hostile ships or other potential threats.
Some of the aircraft utilised were fitted with modified navigational aids and electronic sensors to help the crew with tracking over the sea and with monitoring shipping movements (although it is understood that the squadron utilised its normal aircraft serials when performing this role).