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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.
When several targets are present, the radar tracker aims to provide one track for each target, with the track history often being used to indicate where the target has come from. When multiple radar systems are connected to a single reporting post, a multiradar tracker is often used to monitor the updates from all of the radars and form tracks ...
The United States military unleashed a wave of attacks targeting radar sites operated by Yemen's Houthi rebels over their assaults on shipping in the crucial Red Sea corridor, authorities said ...
Automatic target recognition (ATR) is the ability for an algorithm or device to recognize targets or other objects based on data obtained from sensors.. Target recognition was initially done by using an audible representation of the received signal, where a trained operator who would decipher that sound to classify the target illuminated by the radar.
EOTS technology is designed for day and night operations, features stabilized lines of sight and automatic target tracking allowing operators to engage targets with high accuracy. They can be deployed on platforms such as aircraft, armored vehicles, or naval systems, providing extended-range detection of ground and aerial threats [ 2 ] [ 3 ]
In these systems, the operator would select a target using the strobe, and then circuits in the radar would automatically track the target in azimuth and elevation. This eliminated the need for the additional operators. Since the target's range would continue to change as it moved, the circuitry also attempted to keep the strobe centered in range.
SPY-1D(V), the Littoral Warfare Radar, was an upgrade introduced in 1998 with a new track initiation processor for high clutter near-coast operations, where the earlier "blue water" systems were especially weak. The waveform is coded and signal processing is improved.