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TVOR very high frequency terminal omni range station.
T5 R+ J4 S& N" V- v! aTWR Tower (Control Tower) 6 I% Q5 L% ?1 y4 B2 D( M; r2 _
TYPE (1) As used with respect to the certification, ratings, privileges, and limitations of airmen, means a specific make and basic model of aircraft, incl... e: _" a, _# R# a* F) t' Z
U Airspace Euro control project Class U (unknown traffic)
, P! a$ R% l/ A5 g( n: g5 }U/S unserviceable
. m* O3 @' z$ X1 q0 @7 KU/V ADF UHF/VHF Automatic Direction Finding 1 Y/ Q6 ]# p( V0 N
UAT Universal Access Transceiver - @$ r; x, w4 b( ^$ a* |
UAV Unmanned (or Uninhabited) Aeronautical (or Aerial) Vehicle
( G5 F+ _. W9 R4 S) z& L7 gUFN Until Further Notice 1 M# b& o5 E! x; D7 R
UFO Unidentified Flying Object
' U9 w! l1 [+ ~UHF Ultra High Frequencies (300 MHz-30 GHz)
) v$ z- V; A: |" V; h" IUHF/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; % k9 u8 C5 {5 L$ W
UL Ultra light, Ultra-l©ger motoris© 8 p7 W* n* w/ l' z) A. w
ULM Ultra light, Ultra-l©ger motoris© - e0 |. h. j, j2 H3 ]0 V6 }+ R
ULTRALIGHT VEHICLE An aeronautical vehicle operated for sport or recreational purposes which does not require FAA registration, an airworthiness certificate, nor pilot c... ; T+ @% T+ @( u/ ^' J' H1 z D
UMAS Unmanaged Air Space (Euro control Definition) 5 ^' F+ z [3 {' {3 s# d7 p D
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...
) T y* R1 V) K$ D& u# c0 tUNDERCARRIAGE STRUT A part of an airplane`s structure, designed to resist distortion, which supports the landing gear. 6 h4 [) k0 f5 g+ f
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 ... 6 y B( q# h7 I' n; B: y4 e
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...
) x. J) y: F6 y6 @UNIT LESS No units, such as ratios; a quantity with standard units of 1; a quantity with primary units of 1; Synonyms: dimensionless; ; X/ n: c. e/ H4 g
UNIT 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...
& G' I0 G$ p2 ^9 n9 v% NUNIT 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 ~1 s1 ]" P( f$ K9 F
UNITED 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... ' L' c8 |: ?' E2 y! I" s
UNITED STATES AIR CARRIER a citizen of the United States who undertakes directly by lease, or other arrangement, to engage in air transportation. 0 N' ?. ^& ^9 ?+ n
UNITS A standard quantity, such as ft or mi; Synonyms: dimension; / A. b5 J" G0 h! w: P0 t
UNIVERSAL 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; . g5 w+ p; [+ _% a- e5 r8 l
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... & [: p" S! F& ]/ z$ j7 v
UPKEEP Codename for Barnes Wallis` bouncing bomb used in the Dambusters` raid ' V Q7 b3 ?7 G+ Z! W7 f f. _* J
URB User Relations Bureau (CFMU)
" V. q0 a. [2 _( WUSABLE FUEL (LBS) Usable fuel (gallons) x 6.7 lbs/gallon
3 N, L0 Z# s* uUSAF US Air Force
: H+ D, S6 N. I. j+ j ^" c; ~: x3 Y5 pUSEFUL LOAD Maximum Ramp Weight - (minus) Basic Operating Weight
% {+ k$ _" c" c T. Q# fUSG (AL) US-Gallon (3.78 Liter)
* E) \' I W* Z+ s0 _: t/ R, z# oUTC Universal Coordinated Time.
5 Q/ t# V8 K0 ~4 {* E$ m# b# DUTM Universal Transverse Mercator
4 J- L) g2 k' u8 N0 H; F3 `7 DV Universal Time Coordinated |
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