Scale 1:48. Plan shows the starboard inboard profile, looking from the port side, as fitted for the T class submarines Turpin (1944) & Thermopylae (1945). A separate partial profile of the conning tower specifically for Thermopylae, is also included on the plan. A Chatham Dockyard Manager of Constructive Department stamp, bearing the signature of G. Hudson, who has signed on behalf of the Manager of Constructive Department, is printed on the drawing.