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Mini-automatic radar plotting aid (or MARPA) is a maritime radar feature for target tracking and collision avoidance. Targets must be manually selected, but are then tracked automatically, including range, bearing, target speed, target direction (course), CPA (closest point of approach), and TCPA (time of closest point of approach), safe or dangerous indication, and proximity alarm.
A typical shipboard ARPA/radar system. A marine radar with automatic radar plotting aid (ARPA) capability can create tracks using radar contacts. [1] [2] The system can calculate the tracked object's course, speed and closest point of approach [3] (CPA), thereby knowing if there is a danger of collision with the other ship or landmass.
Marpa, Peru, ruins of a pre-Columbian town located along the Cotahuasi Canyon in the Andes range of southern Peru; MARPA, Modification and Replacement Parts Association; Mini-automatic radar plotting aid; Earley parser, one variant of which is the Marpa parser
MARPA's members include many air carriers from around the world. MARPA has an air carrier committee that remains quite active. [4] The committee was originally formed by MARPA Director Josh Abelson, and since then has been chaired by Cori Ferguson of Alaska Airlines (2006–2008), David Linebaugh of Delta Air Lines (2008–2011), Steve Jones of American Airlines (2011–2013), William Barrett ...
Mark Andrew Richards (January 20, 1952) is a retired American engineer best known for his textbooks and professional education courses in the area of radar and radar signal processing. He remains employed part time as a Principal Research Engineer and adjunct professor in the School of Electrical and Computer Engineering (ECE) at the Georgia ...
The AN/FPS-117 is an L-band active electronically scanned array (AESA) 3-dimensional air search radar first produced by GE Aerospace in 1980 and now part of Lockheed Martin. [1] [2] The system offers instrumented detection at ranges on the order of 200 to 250 nautical miles (370 to 460 km; 230 to 290 mi) and has a wide variety of interference and clutter rejection systems.
The Airport Movement Area Safety System (AMASS) visually and aurally prompts tower controllers to respond to situations which potentially compromise safety. AMASS is an add-on enhancement to the host Airport Surface Detection Equipment Model 3 (ASDE-3) radar that provides automated aural alerts to potential runway incursions and other hazards.
The AN/CPS-9 radar used an operating frequency in the X band. [4] This corresponds to a wavelength of about 3 cm. These radars had a dish diameter of a little less than 8 feet. [4] The radar beamwidth was 1 degree. [4] The CPS-9 antenna required no radome, and the entire radio frequency (RF) transmitter–receiver package rode on the back of ...