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AIM
Abbreviation/
Acronym
Meaning
V
REF
. . . . . . . The reference landing approach speed,
usually about 1.3 times V
so
plus 50 percent
of the wind gust speed in excess of the
mean wind speed.
V
SO
. . . . . . . . The stalling speed or the minimum steady
flight speed in the landing configuration at
maximum weight.
VTF . . . . . . . Vector to Final
VV . . . . . . . . Vertical Visibility
VVI . . . . . . . Vertical Velocity Indicator
V
Y
. . . . . . . . Speed for best rate of climb
V
YI
. . . . . . . . Instrument climb speed, utilized instead of
V
Y
for compliance with the climb
requirements for instrument flight
WA . . . . . . . . AIRMET
WAAS . . . . . Wide Area Augmentation System
WFO . . . . . . . Weather Forecast Office
Abbreviation/
Acronym
Meaning
WGS
−
84 . . . . World Geodetic System of 1984
WMO . . . . . . World Meteorological Organization
WMS . .
Wide
−
Area Master Station
WMSC . . . . . Weather Message Switching Center
WMSCR . . . . Weather Message Switching Center
Replacement
WP . . . . . . . . Waypoint
WRA . . . . . . Weather Reconnaissance Area
WRS . . . . . . . Wide
−
Area Ground Reference Station
WS . . . . . . . . SIGMET
WSO . . . . . . Weather Service Office
WSP . . . . . . . Weather Systems Processor
WST . . . . . . . Convective Significant Meteorological
Information
WW . . . . . . . Severe Weather Watch Bulletin
Abbreviations/Acronyms
Appendix 3
−
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