FAA AMT Airframe Practice Exam 2026 – Complete Exam Prep Guide

A radar altimeter is a type of altimeter that measures the altitude above the ground level. It uses radar waves to determine the distance between the aircraft and the ground directly beneath it. This information is crucial for a pilot to maintain safe and accurate altitude above the ground especially during takeoff and landing. Therefore, the correct answer is C - Altitude above ground level. The other options are incorrect because a radar altimeter does not provide information on speed above ground level, distance from the destination, or the weight of the aircraft.