Scale 1:48. Plan shows a dyeline copy of a partial inboard profile [port profile looking from starboard] and fly diagram, as fitted, of the M-class submarine seaplane carrier M2 (1919). The drawing was modified at Chatham yard dated October 1927 and shows the hangar for the Peto seaplane on top of the superstructure. Additional annotations in pencil are also noted on the plan. A note on the plan states that drawing M. C. D. 2856 contains additonal details of the seaplane hangar.