On board the type 81 general purpose frigate HMS Ashanti (1959) alongside North Corner Jetty in Portsmouth Dockyard during her September 1968 to April 1970 refit. The photographer is in the operations room between 41½ and 45½ stations on 1 deck looking to starboard from the centreline at 44 station showing, on the right, The Admiralty Research Laboratory plotting table, the Limbo mortar control unit, the asdic type 170 attacker unit, the sonar type 162 control unit, the asdic type 177 unit, a telephone control box and a loudspeaker. Against the side of the ship are a communications drawer unit with a hinged centre flap, a sonar type 162 recorder unit, a sonar type 162 transmitter/receiver unit, a junction box and a number of telephone control and switch boxes and telephones. A vertical format negative.