radar aids
1Radar navigation — Marine radar systems can provide very useful navigation information in a variety of situations. When the vessel is within radar range of land or special radar aids to navigation, the navigator can take distances and angular bearings to charted… …
2radar — ra‧dar [ˈreɪdɑ ǁ dɑːr] noun [uncountable] 1. be off/below the radar ( screen) used when saying that people do not know about or are not thinking about something, especially something that will later become important: • Many of these technologies …
3radar required — A term displayed on charts and approach plates and included in the FDC NOTAMs (flight data center notices to airmen) to alert pilots that segments of either an instrument approach procedure or a route are not navigable because of either the… …
4Types and uses of radar — Radar has many different types and applications: * Search radars scan a wide area with pulses of short radio waves. They usually scan the area two to four times a minute. The waves are usually less than a meter long. Ships and planes are metal,… …
5Automatic Radar Plotting Aid — A maritime radar with Automatic Radar Plotting Aid (ARPA) capability can create tracks using radar contacts. The system can calculate the tracked object s course, speed and closest point of approach (CPA), thereby knowing if there is a danger of… …
6H2S radar — The H2S radar was used in bombers of RAF Bomber Command. It was designed to identify targets on the ground for night and all weather bombing. The transmitter/receiver equipment was officially known as TR3159 (H2S Mk I/ASV VIB) or TR3191 (H2S Mk… …
7Millimeter cloud radar — Millimeter wave cloud radar is a radar system designed to monitor cloud structure with wavelengths about ten times shorter than those used in conventional storm surveillance radars such as NEXRAD. The National Oceanic and Atmospheric… …
8Mini-automatic radar plotting aid — This article is about the radar plotting aid. For the PMA aircraft parts trade association see Modification and Replacement Parts Association. Mini automatic radar plotting aid (or MARPA) is a radar feature for target tracking and collision… …
9Surveillance radar approach — A Surveillance Radar Approach (SRA or ASR) is an aviation term for a type of instrument approach provided with active assistance from Air Traffic Control during the final approach phase. It requires no special equipment in addition to a standard… …
10Radio Navigational Aids — The Radio Navigational Aids (Publication 117) publication contains a detailed list of selected worldwide radio stations that provide services to the mariner.National Geospatial Intelligence Agency, 2008.] The publication is divided into chapters… …
