A 2¼ square film negative. The Type 12 frigate Yarmouth (1959) in No. 2 dry dock in Rosyth Dockyard. A close view of the Hull Outfit 15 Type 170B attack sonar dome in the raised position in the hull between 10 and 13 stations. The photographer is under the keel looking up and aft. A photographic print from this negative is stamped 'Planning Department Design Division 8 May 1981 H M Dockyard, Rosyth'.