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In addition to information on lighted aids to navigation and sound signals in foreign waters, the NGA List of Lights provides information on storm signals, signal stations, racons, radiobeacons, and radio direction finder calibration stations located at or near lights. Publication number 117, Radio Navigational Aids, is the primary source for ...
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 United Kingdom Hydrographic Office (UKHO) is the UK's agency for providing hydrographic and marine geospatial data to mariners and maritime organisations across the world. The UKHO is a trading fund of the Ministry of Defence (MoD) and is located in Taunton , Somerset , with a workforce of approximately 900 staff.
Initially charts were produced only for use by the Navy, but in 1821, Thomas Hurd, who had succeeded Dalrymple as Hydrographer in 1808, persuaded the Admiralty to allow sales to the public. [4]: 27 [5]: 105–106 The first catalogue of Admiralty charts was published in 1825, and listed 756 charts. [6]
Light vessel no. 69 69: South Goodwin [27] (until Oct 1940) 21 Oct 1940: Destroyed by a mine on 21 October 1940 while on station at South Goodwin. [26] Light vessel no. 70 70: 15 Dec 1902 [29] John Crown & Sons Ltd 109: Morecambe Bay [30] (1903) 16 Jul 1903: Vessel lost due to a collision with Abbott on 16 July 1903. [28] Light Vessel 72 72: 30 ...
Thornycroft's part of the Admiralty's 1896-97 order for 30-knot torpedo boat destroyers. Length 64.0 metres (210.0 ft). Ariel did 30.8 knots on trials. [155] [156] HMS Cygnet: 320 270 HMS Cynthia: 321 270 1900 HMS Albatross: 318 380 The Admiralty's 1896-97 orders included three special 33-knotters, of which Thornycroft was assigned one.
An example of a complete light characteristic is "Gp Oc(3) W 10s 15m 10M". This indicates that the light is a group occulting light in which a group of three eclipses repeat every 10 seconds; the light is white; the light is 15 metres above the chart datum and the nominal range is 10 nautical miles.
The harbour defence motor launch (HDML) was a 72 ft (22 m) long British-designed motor vessel used for harbour defence during World War II. Nearly 500 were built by numerous Allied countries during the war. The HDML was designed by W J Holt at the Admiralty in early 1939.