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Each volume contains lights and other aids to navigation that are maintained by or under the authority of other governments. In the UK, the UKHO List of Lights and Fog Signals, and the Admiralty List of Radio signals are split into separate volumes. [5] [6] The UKHO light lists include some 85,000 light structures of significance for navigation ...
The front cover of a List of Lights volume. A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices. Some nations, including the United Kingdom and the United States, publish lists that cover the whole world in many volumes. Other nations ...
The first revolving light was fitted to the Swin Middle lightvessel in 1837. [citation needed] Tongue Tongue Sands 51°30′39″N 1°23′5″E [22] North Sea: Jenni Baynton, Light vessel no. 5 (1973) Lynn Well Trinity House: The Wash: Gull Stream, Light Vessel no. 89: Replaced with a Lanby in September 1973. Would Haisborough Sands: North Sea
Metrication and computerisation of charts began in the later 1960s and early 1970s under the leadership of Rear-Admiral Sir Edmund G. Irving (1960–1966), Rear-Admiral George Stephen Ritchie (1966–1971), Rear-Admiral Geoffrey P. D. Hall (1971–1975) and Rear-Admiral Sir David W. Haslam (1975–1985).
The British admiralty charts are compiled, drawn and issued by the Hydrographic Office. This department of the Admiralty was established under Earl Spencer by an order in council in 1795, consisting of the Hydrographer, Alexander Dalrymple, one assistant and a draughtsman. The initial remit was to organise the charts and information in the ...
A Morse code light is light in which appearances of light of two clearly different durations (dots and dashes) are grouped to represent a character or characters in the Morse Code. For example, "Mo(A)" is a light in which in each period light is shown for a short period (dot) followed by a long period (dash), the Morse Code for "A".
A motor launch (ML) is a small military vessel in Royal Navy service. It was designed for harbour defence and submarine chasing. Similar vessels were used by the Royal Air Force for armed high-speed air-sea rescue. Some vessels for water police service are also known as motor launches. Motor launches were slower than motor torpedo boats and ...
The U.S. Navy Hydrographic Office published its first NtM in 1869 and has issued NtMs weekly since 1886. How the information is compiled, organized and disseminated has evolved in the years since then but the NtM mission to provide mariners with accurate navigation information has remained the same.