A 2¾ x 2¼ film negative. On board the Type 12 frigate Yarmouth (1959) alongside the South-West Wall in Portsmouth Dockyard. Inside the Electrical Maintenance Room on the port side of the centreline on 1 deck between 39 and 42 stations looking forward and to starboard from the door. Above the workbench on the left is a row of six power points, four distribution boards, an extending arm lamp and a 500 volt DC indicator box. A vertical format image.