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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.
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.
Visual observation (e.g., unaided, binoculars, and night vision), audio exchanges (e.g., whistle, horns, and VHF radio), and radar or automatic radar plotting aid are historically used for this purpose. These preventive mechanisms sometimes fail due to time delays, radar limitations, miscalculations, and display malfunctions, and can result in ...
ASV radar; Automatic radar plotting aid; Aviation transponder interrogation modes; B. Barker code; ... This page was last edited on 12 July 2024, at 21:50 (UTC).
Step 1. Plot out course of 150 degrees true on Radar Plotting Sheet; Step 2. Measure length of course by using speed of 8 knots and converting into nautical miles via the time, speed, and distance scale; Step 3. Plot the length of speed on Radar Plotting sheet; Step 4. Plot out desired course of 166 degrees true on Radar Plotting Sheet; Step 5.
In this U.S. Army Coast Artillery Corps plotting room, the table is a Whistler-Hearn plotting board.Other devices for fire control are visible on the table. Cut-away view of a Royal Navy World War II K-class destroyer Director Control Tower (D.C.T.) with Type 285 radar; plotting room shown on lower level This massive concrete casemate housed the underground plotting room for the 12-inch ...
The surface plot on a Cold War era British warship. In naval terminology, a plot is a graphic display that shows all collated data from a ship's on-board sensors, i.e. radar, sonar and EW systems. They also displayed information from external sources - for example, other vessel or aircraft reports.
Space-time adaptive processing (STAP) is a signal processing technique most commonly used in radar systems. It involves adaptive array processing algorithms to aid in target detection. Radar signal processing benefits from STAP in areas where interference is a problem (i.e. ground clutter, jamming, etc.). Through careful application of STAP, it ...