A half plate sheet film negative. On board the Type 12 frigate Yarmouth (1959) alongside the south-east corner of the fitting out basin in John Brown & Co Ltd's shipyard at Clydebank. In the enclosed bridge on 01 deck looking aft and to starboard from the centre. On the right is a chart table with a fleet disposition board and an inclinometer above it. To the left of it is a Decca Navigator unit over a wooden box. A radiator is by the side of the open hatch leading down to 1 deck lobby. On the left is a range of communications tables with voice pipes and morse keys.