RADAR collision avoidance systems utilize inputs from each of the following except which device?

RADAR collision avoidance systems primarily rely on inputs that help determine the ship's position, speed, and direction to effectively assess potential collision threats. Each of the devices mentioned serves a specific function to enhance situational awareness and navigation.

Your ship's GPS provides precise location data, allowing the system to understand its position relative to other objects. The ship's compass aids in determining its heading, which is crucial for navigating and avoiding collisions based on directional information. The radar altimeter can measure the distance from the ship to the water surface or other objects, offering valuable height data that complements the radar system’s information.

In contrast, the ship’s anemometer measures wind speed and is primarily used for sailing and meteorological purposes. While wind data can be important for overall navigation and performance, it does not contribute directly to the functioning of RADAR collision avoidance systems. Therefore, this device is the outlier in the context of inputs used by these systems for collision avoidance.