Series Number Id: UNKNOWN. Royal Naval Air Service flying map of Kiel Canal, 1915 (River Elbe to Kiel Harbour), in two sectons on one sheet, intended to be joined together. Includes sketch of "Rendsburg Railway Bridge (View during construction)". Detail black; water blue; woods and forests green; roads yellow/ochre; towns and villages red. Compass roses printed on each map section. "Prepared for Air Department purposes by the Hydrographic Department of the Admiralty, 1st June 1915, under the Superintendence of Captain J. F. Parry, R.N., Hydrographer." Map segments labeled A5 and A6 respectively., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 619.