On board the County class guided missile destroyer London (1961) alongside the fitting out berth at the Neptune Works of Swan, Hunter & Wigham Richardson Ltd at Wallsend-on-Tyne. The ship is berthed starboard side to the quay. The photographer is in the asdic instrument room between 38 and 45 stations on 4 deck looking forward on the port side showing units SC No. 1 and SC No. 2 against the ship's side. Junction boxes, a starter panel and a switch box are against the asdic trunk on the right. An emergency change over switch and connection box, a transformer and a ventilation unit are against the forward bulkhead. A vertical format negative.