On board the Type 81 frigate Gurkha (1960) alongside the fitting out berth of John I Thornycroft & Co Ltd at Woolston, Southampton. The photographer is in the asdic instrument compartment between 16 and 28 stations on 3 deck looking aft and to port from the starboard side at 18 station showing standard electronic cabinets A to G against the ship's side. The watertight hatch in the deck is over the Hull Outfit 15 Type 170B asdic. The winch for hoisting the asdic dome manually is in the left foreground with three standard electronic cabinets abaft it. A telephone and an electric fire are against the aft bulkhead.