Garmin aera 660 Pilot’s Guide190-02017-20 Rev. AAppendix J173Overview Navigation Flight Planning Hazard Avoidance Additional Features Appendices IndexAPPENDIX J: GLOSSARYADIZ Air Defense Identification ZoneADS-B Automatic Dependant Surveillance -BroadcastADS-B In Ability to receive ADS-B information from other aircraft andGround Based Transceivers (GBTs)ADS-B Out Ability to transmit ADS-B data on 1090 ES or 978 MHzADS-BParticipatingAircraftAn aircraft that has both ADS-B In and ADS-B Outcapabilities.ADS-R Automatic Dependent Surveillance-RebroadcastAGL Above Ground LevelAIRMET Airman’s Meteorological InformationARTCC Air Route Traffic Control CenterASOS Automated Surface Observing SystemATC Air Traffic ControlATIS Automatic Terminal Information ServiceAWOS Automated Weather Observing SystemBearing The compass direction from the present position to adestination waypoint.ºC degrees CelsiusCalibratedAirspeedIndicated airspeed corrected for installation and instrumenterrors.cm centimeterCOM communication radioCourse The line between two points to be followed by the aircraft.Course to Steer The recommended direction to steer in order to reducecourse error or stay on course. Provides the most efficientheading to get back to the desired course and proceed alongthe flight plan.