Garmin GDU™ 37X Pilot’s Guide 190-01054-00 Rev. E114Hazard AvoidanceOverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexPIREPSPilot Weather Reports (PIREPs) provide timely weather information for a particularroute of flight. When significant weather conditions are reported or forecast, Air TrafficControl (ATC) facilities are required to solicit PIREPs. A PIREP may contain unforecastadverse weather conditions, such as low in-flight visibility, icing conditions, wind shear,and turbulence. PIREPs are issued as either Routine (UA) (blue) or Urgent (UUA)(yellow).Urgent (UUA)PIREPPIREP DataRoutine (UA)PIREP SelectedFREEZING LEVELSFreezing Level shows contours for the lowest forecast altitude where icing conditionsare likely to occur.Freezing Level Data