AviationOnline for EASA Part-66 & Groundschool

AviationOnline
for EASA Part-66 & Groundschool

Aviation Glossary

An A-Z of all aviation abbreviations

This online glossary provides a comprehensive list of all major aviation abbreviations.


U

UB

utility bus

UHF

ultra high frequency

ULB

underwater locator beacon

ULD

unit load device

UTC

coordinated universal time

V

V1

decision speed (committed to take-off)

V2

take-off safety speed

VA

maneuvering speed

VREF

reference landing speed

VR

rotation speed (lift nose for take-off)

VAU

voltage averaging unit

VBV

variable bypass valve

VEP

video entertainment player

VFR

visual flight rules

VHF

very high frequency

VIGV

variable integrated guide vane

VIU

video interface unit

VL

VLV

valve

VNAV

vertical navigation

VOR

VHF omni-directional radio range

VOR/MB

VOR marker beacon

VOS

velocity of sound

V/S

vertical speed

VSCF

variable speed constant frequency

VSI

vertical speed indicator

VSV

variable stator vane

VTO

volumetric top-off

W

WAI

wing anti-ice

WES

warning electronic system

WEU

warning electronic unit

WHCU

window heat control unit

WOW

weight-on-wheels

WPT

waypoint

WTAI

wing thermal anti-icing

WXR

weather radar

X

xdcr

transducer

xfr

tansfer

xmt

transmit

xmtr

transmitter

Z

ZFW

zero-fuel weight

ZMU

zone management unit

ZNC

zone network controller

ZNTU

ZNU telephone distribution unit

ZPC

zone power converter