SYMBOLS, ABBREVIATIONS AND TERMINOLOGY IN AVIATION

GENERAL AIRSPEED TERMINOLOGY AND SYMBOLS

KCAS-- Knots Calibrated Airspeed is indicated airspeed corrected
for position and instrument error and expressed in knots.
Knots calibrated airspeed is equal to KTAS in standard
atmosphere at sea level.

MPH CAS-- Miles per Hour Calibrated Airspeed

KIAS Knots Indicated Airspeed is the speed shown on the
airspeed indicator and expressed in knots.

MPH lAS-- Miles per Hour Indicated Airspeed

KTAS-- Knots True Airspeed is the airspeed expressed in knots
relative to undisturbed air which is KCAS corrected for
altitude, temperature and compressibility.

VA-- Maneuvering Speed is the maximum speed at which full or
abrupt control movements may be used.

VFE-- Maximum Flap Extended Speed is the highest speed
permissible with wing flaps in a prescribed extended
position.

VNE-- Never Exceed Speed is the speed limit that may not be
exceeded at any time.

VNO-- Maximum Structural Cruising Speed is the speed that
should not be exceeded except in smooth air, and then only
with caution.

VSO-- Stalling Speed or the minimum steady flight speed at
which the airplane is controllable in the landing
configuration.

VS1-- Stalling Speed or the minimum steady flight speed
obtained in a specific configuration.