Abbreviation/
Acronym

Meaning

Abbreviation/
Acronym

VNEI .

Instrument flight never exceed speed,
utilized instead of VNE for compliance with
maximum limit speed requirements for
instrument flight

VOR .

Very High Frequency Omni-directional
Range

VORTAC .

VHF Omni-directional Range/Tactical Air
Navigation

VOT .
VR
VREF .

VOR Test Facility
VFR Military Training Route
The reference landing approach speed,
usually about 1.3 times Vso plus 50 percent
of the wind gust speed in excess of the
mean wind speed.

WA
WAAS .
WFO .
WGS-84
WMO
WMS
WMSC .
WMSCR

AIRMET
Wide Area Augmentation System
Weather Forecast Office
World Geodetic System of 1984
World Meteorological Organization
Wide-Area Master Station
Weather Message Switching Center
Weather Message Switching Center
Replacement

VSO

The stalling speed or the minimum steady
flight speed in the landing configuration at
maximum weight.
Vector to Final
Vertical Visibility
Vertical Velocity Indicator
Speed for best rate of climb
Instrument climb speed, utilized instead of
VY for compliance with the climb
requirements for instrument flight

WP
WRA
WRS .
WS
WSO
WSP .
WST .

Waypoint
Weather Reconnaissance Area
Wide-Area Ground Reference Station
SIGMET
Weather Service Office
Weather System Processor
Convective Significant Meteorological
Information

WW .

Severe Weather Watch Bulletin

VTF .
VV
VVI .
VY
VYI

Abbreviations/Acronyms

Meaning

Appendix 3-5