eight colour chart-maps of the US "Omaha" ("Beach 46") and "Utah" ("Beach 49") landing areas showing elevations and physical features with German defences marked in red, numbered US Chart Map numbers 1001-1008, with key and instructions for use with Profile Sheets and Tidal Curves on the verso of each, Chart 1002 with Profile Sheet and Tidal Curve attached and marked up for 6am on 6 june 1944, each marked "BIGOT - TOP SECRET Until operations are announced, thereafter RESTRICTED", by the Information Section of the Office of the Chief Engineer, ETOUSA, each measuring 635 x 900 mm., dated 21 May 1944; eight accompanying Profile Sheets each with three vertical cross-sections representing specific points marked on each chart, each measuring 635 x 900 mm.; three sets of graphs showing tidal curves at "Utah" and "Omaha" beaches for 30 May to 12 June 1944, security level "TOP SECRET" cancelled with replacement "RESTRICTED" stamp; two copies of a transparency of Landing Craft Silhouettes, depicting to scale cross-sections of 9 different sorts of vessel used in the attack, designed for use in conjunction with the Chart Maps and related material, in paper wrappers bearing printed instructions, 130 x 205 mm.; two copies of "Instructions for the Use of US Chart Maps for Amphibious Operations", 740 x 535 mm.; two copies of the "Index US Chart Maps Developed for "OVERLORD" Operation"; 25 photographic prints of the "D-Day" Operations, each about 240 x. 200 mm.; two 16mm. reels labelled "True Glory" reels one and two; with some related material, some browning and nicks to some of the maps
the charts that made possible the d-day landings at "omaha" and "utah" beaches; once the property of hugo van kuyck, the man that designed them. Van Kuyck - who himself landed at Omaha beach on 6 June 1944 - was a talented Belgian architect who had joined the US army in 1942 and soon rose to the rank of Major. He explained his task in a 1948 lecture:
"...The absolutely number one requirement for any soldier is his map. The landing operations required special maps, showing part of the land, part of the sea, and more particularly the part of the beach involved. The tides on the Normandy coast are very strong: on D-Day, the difference between high and low tide was six meter (about 23 feet). The level of the tide in relation to the hour had to be charted day by day, in order to plan weeks beforehand the exact unloading schedules..."
Each detailed map of a section of one of the landing beaches was marked with three horizontal lines, alphabetically labelled up the beach. Vertical cross-sections or profiles corresponding to each of those lines were provided on a separate sheet, so once a party knew where they were to land they could cut out the relevant cross section (marked, for example, "A.A.") and attach it to the chart along the relevant line. Each profile sheet also had a space where a tidal chart could be inserted from a series of such charts covering a period of two weeks around the proposed invasion date. By marking a line from the tidal depth at the time of approach against the vertical profile laid onto the chart, this "ortho-tidal projection" provided the exact contours of the coastline at the crucial moment of invasion. This ingenious system even made it possible to check exactly how close to the beach any landing ship could reach before running aground, by moving the scaled cross-sections of the ships along the marked up vertical profile.
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