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TVOR very high frequency terminal omni range station.
' O5 t6 ^. ]7 ?5 I, yTWR Tower (Control Tower)
) ?7 F, Z9 n. m0 R9 n% X% I7 zTYPE (1) As used with respect to the certification, ratings, privileges, and limitations of airmen, means a specific make and basic model of aircraft, incl... * |/ w0 Z2 T: M" K, h# x$ P6 n4 [
U Airspace Euro control project Class U (unknown traffic) , ^7 w. [- P1 q2 _, M$ O$ e
U/S unserviceable . }6 X5 D( w7 a' q) E0 I* V
U/V ADF UHF/VHF Automatic Direction Finding
% k0 c/ f- M3 n0 p J' S0 H) dUAT Universal Access Transceiver , J. A! N) S7 A6 E
UAV Unmanned (or Uninhabited) Aeronautical (or Aerial) Vehicle ; t! M- K: R- k4 N: t9 R
UFN Until Further Notice & ?' O/ \5 @* A4 ?
UFO Unidentified Flying Object 8 j% d2 ]/ Y, N T. {+ Z# x
UHF Ultra High Frequencies (300 MHz-30 GHz)
4 `8 @' Q5 M1 w& {2 x% k5 |+ Y, R5 nUHF/VHF AUTOMATIC DIRECTIONFINDING (U/V ADF) An Automatic Direction Finder that determines relative bearing to a transmitter to which it is tuned, in either the UHF band or VHF band; 2 D# {7 L5 X. H3 b4 L) o. x
UL Ultra light, Ultra-l©ger motoris©
) L, z0 e% _, O% C( R, KULM Ultra light, Ultra-l©ger motoris©
0 B# Y: m9 v+ e0 YULTRALIGHT VEHICLE An aeronautical vehicle operated for sport or recreational purposes which does not require FAA registration, an airworthiness certificate, nor pilot c...
% O- I8 I% g" S+ L. P4 M: ?6 QUMAS Unmanaged Air Space (Euro control Definition) % Q; H* g. ^8 @, }3 N
UNDER CAMBER This means that the lower surface of the wing has a hollow curve when observed from front to back. A thin wing with a high camber will be under camber...
# L. m$ I0 A6 |1 F1 XUNDERCARRIAGE STRUT A part of an airplane`s structure, designed to resist distortion, which supports the landing gear. 6 ?+ j. E7 z) ]' u; @
UNIT FUNCTIONS A collection of functions used as standard test cases in control systems engineering; The primary unit functions of interest in avionics are the unit ... 4 i. v; D3 _. U/ Y
UNIT IMPULSE A function used as a standard test case in control systems engineering; a spike of "area" one at time t = 0; Synonyms: impulse; See Also: unit functio...
b0 V% B3 r% p t. f B0 HUNIT LESS No units, such as ratios; a quantity with standard units of 1; a quantity with primary units of 1; Synonyms: dimensionless;
4 V; o/ U$ X9 o3 h4 }3 WUNIT RAMP A function used as a standard test case in control systems engineering; a line of slope 1 starting at zero at time t = 0; Synonyms: ramp; See Also: un...
& l g7 o0 R/ J' b' x) k( BUNIT STEP A function used as a standard test case in control systems engineering; a step from zero to one at time t = 0; Synonyms: step; See Also: unit function...
6 D0 G% f6 b% R. l8 |& A; C9 zUNITED STATES in a geographical sense, means (1) the States, the District of Columbia, Puerto Rico, and the possessions, including the territorial waters, and (2) t... & G6 R' T4 V7 P5 s
UNITED STATES AIR CARRIER a citizen of the United States who undertakes directly by lease, or other arrangement, to engage in air transportation.
5 e9 c6 R. |" L" W; Y# `UNITS A standard quantity, such as ft or mi; Synonyms: dimension;
& `/ Q. d- B* \+ U( Z, L$ RUNIVERSAL TRANSVERSE MERCATOR(UTM) A system of fixed earth coordinates, sometimes used instead of latitude and longitude, accurate relative to others close by, such as ground troops; ) K9 P+ Y5 ?: V
UPDATE A process by which position is reset with a known better position; updates occur at the data source level or at the physical device level, depending u... % H* t; x9 F, ?
UPKEEP Codename for Barnes Wallis` bouncing bomb used in the Dambusters` raid
: ]) c' ]/ p; KURB User Relations Bureau (CFMU) # R q+ t1 K T. s
USABLE FUEL (LBS) Usable fuel (gallons) x 6.7 lbs/gallon ; w+ I: E4 J: ?0 e$ s
USAF US Air Force
. J+ v2 ]- k" ~# jUSEFUL LOAD Maximum Ramp Weight - (minus) Basic Operating Weight $ l( i& V, B) f# V) y! _
USG (AL) US-Gallon (3.78 Liter) % e. v5 r6 T+ ?3 | w4 L
UTC Universal Coordinated Time.
* q0 E8 `& j2 K: W7 ^UTM Universal Transverse Mercator ' i7 b* }; C I, x
V Universal Time Coordinated |
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