On board the type 81 general purpose frigate HMS Tartar (1960) in Portsmouth Dockyard between November 1973 and April 1974 during a refit. The photographer is in the sonar instrument compartment between 16 and 28 stations on 3 deck looking aft and to port from the starboard side at 17 station showing the hand winch and the hatch of the hull outfit 19 (sonar type 170) in the foreground. A number of boxes are on the hatch cover. The standard electronic cabinets B, C, D, E, F and G are against the port side of the ship. A vertical format negative.