Service
Waypoint A position along a route of flight.
WCP WXR Control Panels
WD Wind Direction
WES Warning Electronic System
WEU Warning Electronic Unit
WFA WXR Flat Plate Antenna
WGS World Geodetic System
WGS-72 World Geodetic Survey of 1972
WGS-84 World Geodetic System 1984
Whisper- A sequence of ATCRBS interrogations and suppres
Shout sions of varying power levels transmitted by TCAS
equipment to reduce severity of synchronous interfer
ence and multipath problems.
WIP Work In Progress
WMA WXR Antenna Pedestal & WXR Waveguide Adapter
WMI WXR Indicator Mount
WMS Wide-area Master Station
WMT WXR Mount
WN Week Number
WORD Grouping of bits. Size of group varies from micro-
processor to microprocessor.
WOW Weight On Wheels
WP Working Paper
WPT Waypoint
WRC World Radiocommunication Conference
WRS Wide-area Reference Station
WRT WXR Receiver/Transmitter
WWW Internet World Wide Web
WX Weather
WXI WXR Indicator
WXP Weather Radar Panel
WXR Weather Radar System
WYPT Waypoint Altitude
X
X - BA N D C h a n n e l
X.25 XCVR XFR XLTR XM XMIT XMTR XPD XPDR
Yagi Antenna
YSAS YD
Z ZFW Z-Marker
The frequency ra n ge between 8000 and 12500 MHzX- A DME ch a n n e l . T h e re are 126 X-Channels for DME opera t i o n . For the fi rst 63 ch a n n e l s , the gro u n d -to-air frequency is 63 MHz below the air-to-ground f re q u e n c y. For the second 63 X-channels the gro u n d -to-air frequency is 63 MHz ab ove the air-to-ground f re q u e n c y.
Packet Switched Data Network Transceiver Transfer Translator External Master Transmit Transmitter ATC Transponder (also XPDR,XPNDR,TPR)
Transponder
Y
An antenna with its maximum radiation parallel to the long axis of its array, consisting of a driven dipole, a parasitic dipole reflector, and one parasitic dipole director or more.
Yaw Stability Augmentation System
Yaw Damper
Z
Refer to reflectivity factor Zero Fuel Weight
A marker beacon,sometimes referred to as a station locator, that provides positive identification to the pilot when the aircraft is passing directly over a low-frequency navigation aid.
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