Scale 1:48. Plan is the fly drawing to the plan view and sections, as fitted of the M class submarine M3 (1918). A Chatham Dockyard Constructive Dpeartment Drawing Office stamp, dated 19 June 1929 is printed on the drawing. The plan shows the sections at Frames 10, 25, 49, 67, 85 and 92 looking forward. The drawing also shows the sections at Frames 100, 117, 138, 150 and 159 looking forward.