Garmin G1000 NXi Pilot's Manual

Also see for G1000 NXi: Cockpit reference guide Supplemental Maintenance Manual Cockpit reference guide Reference guide Pilot's guide

Contents

Garmin G1000 NXi Pilot’s Guide for the Cessna Nav III 190-02177-00 Rev. ASYSTEMOVERVIEWFLIGHTINSTRUMENTSEISAUDIO PANEL& CNSFLIGHTMANAGEMENTHAZARDAVOIDANCEAFCSADDITIONALFEATURESAPPENDICESINDEX254HAZARD AVOIDANCE4) Turn the small FMS Knob to select ‘US’ or ‘CNDA’, then press the ENT Key.5) To remove the menu, push the FMS Knob or the CLR Key.The NEXRAD weather product age display indicates either ‘US’ or ‘CN’ for the selected coverage region.refleCTIvITyReflectivity is the amount of transmitted power returned to the radar receiver. Colors on the NEXRADdisplay are directly correlative to the level of detected reflectivity. Reflectivity as it relates to hazardousweather can be very complex.The role of radar is essentially to detect moisture in the atmosphere. Simply put, certain types of weatherreflect radar better than others. The intensity of a radar reflection is not necessarily an indication of theweather hazard level. For instance, wet hail returns a strong radar reflection, while dry hail does not. Bothwet and dry hail can be extremely hazardous.The different NEXRAD echo intensities are measured in decibels (dB) relative to reflectivity (Z). NEXRADmeasures the radar reflectivity ratio, or the energy reflectedback to the radar receiver (designated by theletter Z). The value of Z increases as the returned signal strength increases.neXraD lIMITaTIonSNEXRAD radar images may have certain limitations:• Undetermined precipitation types may be displayed as mixed.• An individual NEXRAD site cannot depict high altitude storms at close ranges. It has no informationabout storms directly over the site.• Precipitation may be occurring below the lowest antenna tilt angle (0.5º), and therefore the radar beamovershoots the precipitation. For example, at a distance of 124 miles from the radar site, the radar beamis approximately 18,000 feet above the radar site. The radar cannot detect any precipitation occurringbelow the beam at this distance and altitude.• At smaller map ranges, the smallest square block on the display represents an area of approximatelyfour square kilometers. The intensity level reflected by each square represents the highest level of radarreflectivity sampled within the area.• Unknown precipitation below 52ºN is displayed as rain regardless of actual precipitation type.