Scale 1:48. Plan shows the sections, as fitted of the Grampus class submarine Grampus (1937). A Chatham Dockyard Manager of Constrictive Department stamp, bearing the signature of J. F. Walker [Manager of Constructive Department at Chatham Dockyard 1930-1946] is printed on the drawing. The plan shows the sections at Frames 12, 22, 38, 43, 55, 62, 73, 79 and 87 looking forward.. The drawing also shows the sections at Frames 93, 104, 114, 122, 136, 145, 157, 161 1/2 and 171 looking aft.