What is Garmin MARPA?

What is Garmin MARPA?

Mini-automatic radar plotting aid (MARPA) enables you to identify and track targets and is primarily used for collision avoidance. MARPA indicates the status of each tagged object (acquiring, lost, tracking, or dangerous), and the chartplotter can sound a collision alarm if the object enters your safe zone. …

What is MARPA target tracking?

Mini-automatic radar plotting aid (or MARPA) is a maritime radar feature for target tracking and collision avoidance.

How does MARPA work?

To use MARPA, you assign a MARPA tag to a target. The radar system automatically tracks the tagged object and provides you with information about the object, including the range, bearing, speed, GPS heading, nearest approach, and time to nearest approach.

What is electronic plotting aid?

Automatic radar plotting aids are essentially utilized to improve the standard of collision avoidance at sea. Primarily designed as anti-collision radar, the ARPA technology removed the chore of plotting targets manually on a reflection plotter or separate plotting aid.

What is automatic tracking aid?

Simplified Automatic Tracking Aid allows you to plot up to 10 targets and the radar automatically traces the targets. • The CPA (Closest Point Approach) and TCPA (Time to CPA) alarm gives an audible warning when the tracking targets come within the set range or time.

What does the true speed vector TV indicates?

True heading and speed of a target can be ascertained with a True Vector, the length of the line indicates the distance the target will actually cover per duration of vector, usually 6 or 3 minutes (this is user selectable). Range permitting, the 6 minute vectors provide quicker mental calculation of speed.

What is the limitation of radar?

Some of the important limitations of Radar are as follows: Small vessels, ice, other small floating objects may not be detected by the radar. Targets in the blind sector and shadow sector of the radar are not displayed.

What is a coded Racon?

A Racon is a type of radar transponder commonly used to mark maritime navigational hazards. The word is an acronym for RAdar beaCON. The response appears as a coded mark (or “paint”) on the ship’s radar display that highlights the range and bearing of the racon.

What is the difference between radar alone and radar with ARPA?

ARPA processes radar information much more rapidly than conventional radar but is still subject to the same limitations. ARPA data is only as accurate as the data that comes from inputs such as the gyro and speed log.

Is the planes speed relative to the ground?

Airspeed cannot be directly measured from a ground position, but must be computed from the ground speed and the wind speed. On a perfectly still day, the airspeed is equal to the ground speed. But if the wind is blowing in the same direction that the aircraft is moving, the airspeed will be less than the ground speed.

What are the two types of ARPA?

Standalone and integral ARPAs All of the ARPA functions were installed on board as a separate unit, but needed to be interfaced with existing equipment to get the basic radar data.