Reading air navigation charts6/29/2023 ![]() Downstream of Lechlade, the navigation channel is normally available for boats of the following approximate drafts. Sometimes, parts of the River Thames between Cricklade and Inglesham are only navigable by small boats. The River Thames varies in depth of water between Cricklade and Teddington. Remember that river levels fluctuate and these distances will change with the river conditions. This is the distance between the standard water level and the highest point of the underside of the bridge. The following table gives the headway of bridges over the River Thames. Teddington Lock (to Teddington Boundary Obelisk) Time to next lock downstream at 8 km/h (minutes) It also gives an estimated travel time based on the speed limit of 8 kilometres per hour (approximately 5 miles per hour). ![]() The following table lists the distances between locks from Cricklade Bridge downstream to Teddington Lock. 35.If you are planning to boat on the River Thames, you may also find our locks and facilities for boaters page useful. 1943 Air Navigation Chart-Mercator Projection-Covers Part of Honduras-all of Nicaragua, Costa Rica, Panama-Parts of Colombia and western Ecuador.Navy Aviation Chart – Mercator Projection-Covers Panama, Pan.-Guantanamo, Cuba. 1948 Army Air Force Aeronautical Chart (like WAC) Covers Paracas Peninsula, Peru 22”x 28.5”.1944 Air Navigation Chart- Mercator Projection-Covers eastern Mex.-south, TX.-south, FL.1936 Aeronautical Map of Tennessee-Covers entire state shows radio ranges, lighted airway and geology.1949 Aeronautical Chart for Radio Direction Finding –Covers San Francisco, CA-Denver, CO.-El Paso, TX.1941 Low Frequency Airway Aeronautical Planning Chart conterminous U.S.Air Force Covers Talara, Peru- Lima, Peru. ![]() Air Force Covers Talara, Peru- Bogotá, Col. Army Air Force Covers Caracas, Venz.-Trinidad, British West Indies.
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