Cockpit Reference Guide

190-00763-02 Rev. A
Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian
309
HAZARD AVOIDANCE
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
Displaying NEXRAD weather information:
1) Select the MAP Softkey (for the PFD Inset Map, select the INSET Softkey). This step is not necessary on the
Weather Data Link Page.
2) Select the NEXRAD Softkey.
CompositedatafromalltheNEXRADradarsitesintheUnitedStatesisshown.Thisdataiscomposedof
themaximumreectivityfromtheindividualradarsweeps.Thedisplayoftheinformationiscolor-coded
toindicatetheweatherseveritylevel.AllweatherproductlegendscanbeviewedontheWeatherDataLink
Page.FortheNEXRADlegend,selecttheLEGENDSoftkeywhenNEXRADisselectedfordisplay.
No Radar
Coverage
Figure 6-11 NEXRAD Data with Legend
ThedisplayofradarcoverageisalwaysactivewheneitherNEXRADorECHOTOPSisselected.Areas
whereNEXRADradarcoverageandEchoTopsinformationisnotcurrentlyavailableorisnotbeingcollected
areindicatedbyagrayshadeofpurple(Figure6-11).
Reflectivity
Reectivityistheamountoftransmittedpowerreturnedtotheradarreceiver.ColorsontheNEXRAD
displaydirectlycorrelatetothelevelofdetectedreectivity.Reectivityasitrelatestohazardousweather
canbeverycomplex.
The role of radar is essentially to detect moisture in the atmosphere. Simply put, certain types of weather
reectradarbetterthanothers.Theintensityofaradarreectionisnotnecessarilyanindicationofthe
weatherhazardlevel.Forinstance,wethailreturnsastrongradarreection,whiledryhaildoesnot.Both
wetanddryhailcanbeextremelyhazardous.