Scale 1:48. Plan shows the sections, as fitted, for the cruiser submarine X1 (1923). The drawing shows the sections at frames 9, 21, 39, 47, 58, 66, 78, 82, 89, 93 and 106, looking forward. The plan also shows the sections at frames 6, 119, 129, 148, 161, 172, 187, 194, 211, 217 and 222 looking aft. The plan bears the signature of P. Palmer [Manager of Constructive Department, Chatham Dockyard 1918-1925] A Chatham Dockyard Constructive Department stamp, dated 9 October 1926, is present on the left hand side of the drawing.