Scale 1:48. Plan shows plan views, as fitted, of the M-class submarine seaplane carrier M2 (1919). The drawing consists of the superstructure, outer hull and flats [internal decks]. The plan also shows modifications in vermillion ink made at Chatham yard dated October 1927. There is a faded Vickers stamp on the left hand side of the plan. There is a stamp from Chatham Yard Constructive Department, dated 6 September 1923, on the left hand side of the plan. A second stamp from the Chatham yard Engineering Department, dated 16 November 1923. A Vickers stamp with the Admiralty Overseer's signature, dated 23 August 1920, is also present on the left hand side of the plan. There is a small tear along the bottom edge in the left hand corner of the plan.