Garmin GDL 88 manual Hat

FIS-B	Flight Information Services-Broadcast. FIS-B is a graphic
	weather display capable of displaying graphical weather
	information on UAT equipped installations. FIS-B is available
	free to any operator with the ability to receive and display
	the data that is broadcast on the Universal Access Transceiver
	(UAT) or the 978 MHz link.
Ground Clutter	A form of radar signal interference that occurs when fixed
	objects close to the transmitter—such as buildings, trees,
	or terrain (hills, ocean swells and waves)—obstruct a radar
	beam and produce echoes.
GPS	Global Positioning System. A space-based Navigation system
	providing accurate position, velocity and time information.
	This instrumentation will be certified as primary navigation.
HAT	Height Above Terrain
HSDB	Garmin’s proprietary High Speed Data Bus.
ICAO	International Civil Aviation Organization.
PABI	Pressure Altitude Broadcast Inhibit.
SBAS	Satellite-Based Augmentation System.
STC	Supplementary Type Certificate
SURF	Surface Situation Awareness. An ADS-B In application that
	provides the ADS-B and external traffic system targets on a
	display to be used by the flight crew for situational awareness.
TA	Traffic Advisory.
TAS	Traffic Advisory System.
TCAD	Traffic Collision Avoidance Device.

7-2 GDL 88 ADS-B Transceiver Pilot’s Guide 190-01122-03 Rev. A