Garmin GPSMAP 695/696 Owner’s Manual190-00919-00 Rev. D 95hazard avoidance Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices IndexneXrAd limitAtionsCertain limitations exist regarding the NEXRAD radar displays. Some, but not all, arelisted for the user’s awareness:• NEXRAD base reflectivity does not provide sufficient information to determinecloud layers or precipitation characteristics (hail vs. rain). For example, it is notpossible to distinguish between wet snow, wet hail, and rain.• NEXRAD base reflectivity is sampled at the minimum antenna elevation angle. Anindividual NEXRAD site cannot depict high altitude storms at close ranges, andhas no information about storms directly over the site.• Radar coverage only extends to 55°N.• Any precipitation displayed between 52°N and 55°N is unknown.neXrAd intensityColors are used to identify the different NEXRAD echo intensities (reflectivity)measured in dBZ. (decibels of Z). “Reflectivity” (designated by the letter Z) is theamount of transmitted power returned to the radar receiver. The dBZ values increaseas returned signal strength increases. Precipitation intensity is displayed using colorscorresponding to the dBZ values.NEXRAD DataRADAR legend
