Drawing of mechanical engine ship's telegraph.

DX/2541
Linen backed drawing and blueprint of mechanical engine ship's telegraph, reply type by H [Herbert] M [Middleton] Maddick, Liverpool, drawing number 561. Some annotations on blueprint. Stamp on blueprint from Barclay, Curle & Co, Ltd, shipbuilders, Glasgow. 6 Jul 1944. Maddick (1876-1948) based in Litherland Park, telegrams used on Mersey ferries?