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There are four different types of plot, each with varying capabilities, i.e. range, depending on their role; [1] Air plot: Used for tracking air contacts, i.e. planes and EW information. Surface plot: Used for tracking contacts on the surface of the water, i.e. other ships. [2] [3] [4] It can also perform a variety of roles such as:
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 radar tracker is a component of a radar system, or an associated command and control (C2) system, that associates consecutive radar observations of the same target into tracks. It is particularly useful when the radar system is reporting data from several different targets or when it is necessary to combine the data from several different ...
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.
AN/MSQ-77 errors included the typical automatic tracking radar errors such as the antenna lag due to the conical scan tracking, Track Range Computer error, any inaccuracy of the A/C transponder delay value used by the central, and the range offset of the A/C transponder antenna from the actual position of the bomb release point(s) on the A/C ...
In response to this, the AN/SPS-26 was prototyped as an experimental aircraft radar that adopted the FRESCAN method for vertical scanning and the mechanical method by turning the antenna for horizontal scanning. The land test was started in 1953, and the offshore test was started in August 1957 in Norfolk. And as a practical machine with ...
Radar is a system that uses radio waves to determine the distance (), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.
In early military radars, range gates were used to select a single target and then pass on this information to other displays where more information could be seen. An example is the AI Mk. IX radar, where the radar operator would use a strobe, an on-screen cursor, to select a single target. A range gate would then filter out all the other ...