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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 ...
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.
Light vessel no. 3, Lightvessel no. 68: Humber Humber Conservancy Board: Humber: Helwick (from 1937 until 1942) Maintained by Humber Conservancy Board. Kentish Knock Kentish Knock: North Sea: Light vessel no. 3, Lightship 2000, Jenni Baynton (from 1949 until 1953) Smiths Knoll Smiths Knoll 52°43′30″N 2°18′0″E [22] Trinity House: North Sea
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.
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 ...
Mullard's first silicon transistors were the OC201 to OC207, PNP alloy types using the standard SO-2 metal-over-glass construction such as the OC200 shown. From about 1960 Mullard switched to using the BC prefix for silicon, and AC for germanium, eliminating the confusion of part numbers. in the mid-1960s the first plastic packages were introduced.
Propulsion machinery consisted of 2 Admiralty Standard Range 16 VMS diesel generators, and two 3,000 shaft horsepower (2,200 kW) electric motors, each driving a 7-foot diameter (2.1 m) 3-bladed propeller at up to 400 rpm. [3] Top speed was 17 knots (31 km/h; 20 mph) when submerged, and 12 knots (22 km/h; 14 mph) on the surface. [3]
The British Polar Engines Diesel Motors of the Oberon-class submarine HMS Ocelot. The engines charged the batteries for the silent electric propulsion of the ship. HMS Ocelot is now a museum ship in Chatham Dockyard. British Polar Engines manufactures, supplies and installs medium speed marine diesel engines and industrial generating sets ...