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 from the centre. On the right is a chart table with a fleet disposition board and an inclinometer above it. On the left is a radiator by the side of the open hatch leading down to 1 deck lobby. Above the hatch is a Decca Navigator unit over a wooden box. In the centre is a chart table with a fleet disposition board and an inclinometer above it. On the right is a J.U.A. display unit with a visual display unit and an hull state board above it.