OPERATIONAL LIMITATIONS AND CONSIDERATIONS
All of the limitations of the radar system have been consolidated here because of their importance. This section should be read thoroughly and frequently as a reminder of weather radar limitations.
. Airborne weather systems are not intended as a terrain or traffic collision avoidance system. Weather detection, analysis, and avoidance are the primary functions of the radar system.
. Your radar is a weather avoidance tool. It should never be used for weather penetration. It will help you see and plan avoidance maneuvers around significant weather encountered during flight.
. Radar detects rain drops and wet hail; not clouds, fog, dry hail, ice crystals, or snow.
. It is important to remember that radars detect the presence of precipitation. Storm associated turbulence without precipitation can extend several thousand feet above a storm and outward more than twenty nautical miles.
. Turbulence detection requires the presence of precipitation. Clear-air turbulence is not detected or displayed.
. The weather display corresponds to the selected range while the turbulence display is overlaid for the first 40 nm in AUTO mode (regardless of range selected).
. Below 1800 feet windshear and weather scans are interleaved. The windshear detection operation is transparent to the crew unless an alert is issued.
. Leave the system in TEST mode until it is safe to operate the radar. While in TEST mode there is no radiation hazard to nearby personnel.
. Reference the following Federal Aviation Administration (FAA) Advisory Circulars: AC 00-24B Thunderstorms AC 00-6A Aviation Weather AC 00-50A Low Level Wind Shear AC 20-68B Recommended Radiation Safety Precautions
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