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