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1Signals intelligence in modern history — This article is a subset article of the article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with signals intelligence in the… …
2Signals intelligence operational platforms by nation — This article is a subset article under the main article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with current signals… …
3Signals intelligence — SIGINT redirects here. For the UNIX signal, see SIGINT (POSIX). RAF Menwith Hill, a large site in the United Kingdom, part of ECHELON and the UK USA Security Agreement. Signals intelligence (often contracted to SIGINT) is intelligence gathering… …
4Signals intelligence by alliances, nations and industries — This article is a subset article under the main article SIGINT, which addresses the unifying conceptual and technical factors in this intelligence discipline. This article describes how the discipline is used by multinational alliances and… …
5international ground-to-air distress signals — Signals used by survivors to indicate messages to the rescue teams looking for them from the air. These signals should be made from fabric or parachutes, pieces of wood, stones, or any other available material. There should be as much color… …
6Signals Intelligence Service — The Signals Intelligence Service (SIS) was the United States Army codebreaking division, headquartered at Arlington Hall. It was a part of the Signal Corps so secret that outside the office of the Chief Signal officer, it did not officially exist …
7North American railroad signals — Main article: North American railway signaling Baltimore and Ohio Railroad Color Position Light bracket masts at Magnolia, West Virginia North American railroad signals generally fall into the category of multi headed electrically lit units… …
8British railway signals — Modern British signalling is based on a two, three and four aspect colour light system using non permissive block rules. It is a basic progression of the original semaphore signalling that can still be found on many secondary lines. Colour light… …
9Hong Kong rainstorm warning signals — The rainstorm warning signals (zh t|t=暴雨警告訊號) are a set of signals used in Hong Kong to alert the public about the occurrence of heavy rain which is likely to bring about major disruptions such as traffic congestion and floods. They also ensure a …
10ground signals — A visual signal displayed on an airfield to give local air traffic rules information to flight crews in the air. These signals are displayed in a signal area 12 m2 and bounded by a white border. Such signal areas are located at aerodromes where… …
