VDC VOLTAGE, DIRECT CURRENT
VDEV VERTICAL DEVIATION
VEL VELOCITY
VENT VENTILATION
VERT VERTICAL
VF CABIN TEMPERATURE FORWARD
VFE MAXI VELOCITY FLAPS EXTENDED SPEED
VFEN VFE NEXT, PREDICTIVE VFE AT NEXT FLAP / SLAT POSITION
VFR VISUAL FLIGHT RULES
VFTO FINAL TAKE OFF SPEED
VG VERTICAL GYRO
VHF VERY HIGH FREQUENCY
VHV VERY HIGH VOLTAGE
VIB VIBRATION
VISV VARIABLE INLET STATOR VANE
VLE MAXIMUM LANDING GEAR EXTENDED SPEED
VLF VERY LOW FREQUENCY
VLS LOWEST SELECTABLE SPEED
VLV VALVE
VM RECOMMENDED MANEUVERING SPEED
VM VOLTMETER
VMAN MANEUVERING SPEED
VMAX MAXIMUM OPERATING SPEED
VMIN MINIMUM OPERATING SPEED
VMO MAXIMUM OPERATING SPEED
VNAV VERTICAL NAVIGATION
VOL VOLUME
VOR VERY HIGH FREQUENCY OMNI DIRECTIONAL RANGE
VOR-D VOR - DME
VORTAC VOR - TACAN
VPSN VALVE POSITION
VR ROTATION SPEED
VREF LANDING REFERENCE SPEED
VRTG BODY NORMAL ACCELERATION
VS VERTICAL SPEED
VS STALLING SPEED
VSC VACUUM SYSTEM CONTROLLER
VSCB CABIN VERTICAL SPEED
VSI VERTICAL SPEED INDICATOR
VSL VERTICAL SPEED LIMIT
VSS STICK SHAKER SPEED
VSV COMPRESSOR STATOR VANE ACTUATOR
VSV VARIABLE STATOR VANE
VSW STALL WARNING SPEED
VSWR VOLTAGE STANDING WAVE RATIO
VV VICE VERSA
VW CABIN TEMP
W WHISKY
W WEIGHT
W WEST
W WHITE
W WIRE
WAF WRAP - AROUND FAILURES
WAI WING ANTI-ICE
WARN WARNING
WAYPOINT EN ROUTE NAVIGATION FIX
WB BLEED AIR FLOW
WBC WEIGHT AND BALANCE COMPUTER
Aircraft Systems - Abbreviations and Acronyms 49

WBS WEIGHT AND BALANCE SYSTEM
WD WARNING DISPLAY
WD WIND DIRECTION TRUE
WF WEIGHT FUEL
WFM WEIGHT OF FUEL METERED, FUEL MASS FLOW
WFQ TOTAL FUEL QUANTITY
WGD WINDSHIELD GUIDANCE DISPLAY
WHC WINDOW HEAT COMPUTER
WIPCU WATER ICE PROTECTION CONTROL UNIT
WL WATER LINE
WLDP WARNING LIGHT DISPLAY PANEL
WNDW WINDOW
WOW WEIGHT ON WHEELS (SIGNAL)
WP WAYPOINT
WPT WAYPOINT
WR WEATHER RADAR
WS WIND SPEED
WSHLD WINDSHIELD
WT WEIGHT
WTB WING TIP BRAKE
WX WEATHER MODE (ND)
WXR WEATHER RADAR
WXR WEATHER RADAR TRANSCEIVER
X X-RAY
X LONGITUDINAL REFERENCE AXIS
X TRANS
XARM CROSS ARM
XBAR CROSSBAR
XBLEED CROSS BLEED
XCEIVER TRANSCEIVER
XCF CROSS CHECK FAILURE
XCVR TRANSCEIVER
XDCR TRANSDUCER
XFEED CROSS FEED
XFER TRANSFER
XFMR TRANSFORMER
XFR TRANSFER
XLINE CROSS LINE
XLTR TRANSLATOR
XMITTER TRANSMITTER
XMSN TRANSMISSION
XMTR TRANSMITTER
XPDR TRANSPONDER
XPONDER TRANSPONDER
XREF CROSS REFERENCE
XTAL CRYSTAL