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TVOR very high frequency terminal omni range station. 0 n+ O6 c& T* Z5 m* e
TWR Tower (Control Tower)
9 U# ~: I, a+ R% @% N/ D, B0 P3 DTYPE (1) As used with respect to the certification, ratings, privileges, and limitations of airmen, means a specific make and basic model of aircraft, incl... 2 X# @0 C) C- R; u
U Airspace Euro control project Class U (unknown traffic)
3 Y6 x) T( e& K* HU/S unserviceable 8 L4 B+ @' t& {2 \
U/V ADF UHF/VHF Automatic Direction Finding + Y- r& |) ?/ W6 b$ l g
UAT Universal Access Transceiver
: @7 E# y) N7 V$ [: l; B, eUAV Unmanned (or Uninhabited) Aeronautical (or Aerial) Vehicle
( y( F7 n, v2 l( ?! ?$ V! n% SUFN Until Further Notice
6 f) x# l+ j8 W+ r* b. K# KUFO Unidentified Flying Object 5 w! Z' ]8 g, B' }; @4 I
UHF Ultra High Frequencies (300 MHz-30 GHz) + B, d# {4 l% X0 m' V# V. \8 U
UHF/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; ! } t% L: b0 f7 Q. K" U
UL Ultra light, Ultra-l©ger motoris©
' ?/ h5 Z3 q( i) d: I" oULM Ultra light, Ultra-l©ger motoris©
2 S/ H; x% r7 f! G2 ~ULTRALIGHT VEHICLE An aeronautical vehicle operated for sport or recreational purposes which does not require FAA registration, an airworthiness certificate, nor pilot c...
1 s3 W# W5 C2 R* wUMAS Unmanaged Air Space (Euro control Definition) * G \$ V4 s4 l( d3 u
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...
* O/ K& V0 m* N0 N, ]2 dUNDERCARRIAGE STRUT A part of an airplane`s structure, designed to resist distortion, which supports the landing gear.
" C; [9 c8 @! RUNIT 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 ...
/ k; h+ b/ _5 [3 NUNIT 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...
0 Y' Z& f3 B5 ^7 m/ pUNIT LESS No units, such as ratios; a quantity with standard units of 1; a quantity with primary units of 1; Synonyms: dimensionless;
" a; @. S; C9 @1 m/ S# zUNIT 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...
' {+ o) u9 V" V* {UNIT 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... 2 ~* {0 z9 O% q
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... * z+ T* e$ i9 Z
UNITED STATES AIR CARRIER a citizen of the United States who undertakes directly by lease, or other arrangement, to engage in air transportation. % @! h7 y' K, L; `3 }2 @0 H
UNITS A standard quantity, such as ft or mi; Synonyms: dimension; 0 c1 @/ b `; O: i/ I4 U
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; * c- L$ }) ]+ h2 \% D" B
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... . }4 u& O# E' ]
UPKEEP Codename for Barnes Wallis` bouncing bomb used in the Dambusters` raid
* q j) A$ \- o9 k7 ?& }URB User Relations Bureau (CFMU) 3 P9 M, ^9 k6 }, b) o6 M) c* H% g
USABLE FUEL (LBS) Usable fuel (gallons) x 6.7 lbs/gallon 3 ^1 a7 f. H, ^3 R8 U3 l
USAF US Air Force
" w9 f+ o0 J+ ?1 B( wUSEFUL LOAD Maximum Ramp Weight - (minus) Basic Operating Weight / u& L! H% h0 _5 n
USG (AL) US-Gallon (3.78 Liter)
4 x4 g9 l. F0 p! ^" aUTC Universal Coordinated Time.
$ |5 b. ]- f' ^UTM Universal Transverse Mercator
; w& I e( q+ vV Universal Time Coordinated |
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