Aviation Glossary
Defining the Language of Aviation
Home
Categories
Abbreviations and Acronyms
Aircraft
Aircraft Navigation
Aircraft Powerplant
Aircraft Structure Terms
Aircraft Systems Terms
Airlines
Airports
ATC Terms
Aviation Maintenance
Aviation Safety
Aviation Terms
Aviation Weather
Definitions
Avionics Terms
FAA
ICAO
Military Aviation
Video
About Us
Browse the Glossary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0-9
Viewing Aviation Terms that Begin with the Letter "U"
U.S.
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
UA
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
UAS
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
UAS (NextGen)
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
,
FAA
,
NextGen
UAT (NextGen)
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
,
FAA
,
NextGen
UAV
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
UFO
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
,
Avionics
,
Navigation
UHF
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
Ulitimate load factor
Filed Under:
Aircraft
Tagged With:
FAA Pilot's Handbook
Ultra-high frequency (UHF)
Filed Under:
Avionics Terms
Tagged With:
FAA Pilot's Handbook
Ultralight Vehicle
Filed Under:
Aviation Maintenance
,
FAA
Tagged With:
Airworthiness
,
FAA
Ultralight-like Vehicle
Filed Under:
Aviation Maintenance
,
FAA
Tagged With:
Airworthiness
,
FAA
Ultrasonic inspection
Filed Under:
Aviation Maintenance
Tagged With:
AMT
,
Maintenance
Uncaging
Filed Under:
Avionics Terms
Tagged With:
FAA Pilot's Handbook
Uncontained Engine Failure
Filed Under:
Aircraft Powerplant
,
Airlines
Tagged With:
Airlines
,
Engines
,
Safety
Uncontrolled airspace
Filed Under:
Aircraft Navigation
Tagged With:
FAA Pilot's Handbook
Uncontrolled Descent (ICAO Definition)
Filed Under:
ICAO
Tagged With:
ICAO
,
International
Underpower
Filed Under:
Aircraft
Tagged With:
FAA Pilot's Handbook
Undershoot/Overshoot (ICAO Definition)
Filed Under:
ICAO
Tagged With:
ICAO
,
International
Unfactored or Certified Landing Distance
Filed Under:
Aircraft
,
Airports
Tagged With:
Airport
,
Flying
,
Landing
Unit Cost per Unit of Output
Filed Under:
Airlines
United States air carrier – 14 CFR 1.1
Filed Under:
FAA
Tagged With:
14 CFR 1.1
,
FAA
,
Regulatory
United States Terminal Procedures Publication (TPP)
Filed Under:
Aircraft Navigation
Tagged With:
FAA Pilot's Handbook
United States, in a geographical sense, – 14 CFR 1.1
Filed Under:
FAA
Tagged With:
14 CFR 1.1
,
FAA
,
Regulatory
Unknown (ICAO Definition)
Filed Under:
ICAO
Tagged With:
ICAO
,
International
Unknown or undetermined (ICAO Definition)
Filed Under:
ICAO
Tagged With:
ICAO
,
International
Unscheduled Maintenance
Filed Under:
Airlines
,
FAA
Tagged With:
Airlines
,
FAA
Unusual attitude
Filed Under:
Aircraft
Tagged With:
FAA Pilot's Handbook
URA
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
URET (NextGen)
Filed Under:
Aviation Terms
USAF
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
USC
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
USCG
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
Useful load
Filed Under:
Aircraft
Tagged With:
FAA Pilot's Handbook
User-defined waypoints
Filed Under:
Aircraft Navigation
Tagged With:
FAA Pilot's Handbook
USOC
Filed Under:
Abbreviations and Acronyms
Tagged With:
Acronym
UTC
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
UWS
Filed Under:
Abbreviations and Acronyms
Tagged With:
Abbreviation
,
Acronym
You Need to Read Why Pilots Die in The Killing Zone
Search Aviation Glossary
Join the Conversation
Scott
on
MACH – Various MACH Related Definitions
Darden Hamilton on
MACH – Various MACH Related Definitions
mostafa on
Flaps – Video
me on
Block Hour
Caroline Kane on
JAR – Joint Aviation Requirements
Tags
14 CFR 1.1
16G
Abbreviation
Acronym
Aerodynamics
Aircraft
Airline
Airlines
Airport
Airports
Airworthiness
AMT
ATC
Aviation Safety
Aviation Weather
Avionics
Bird Strike
Engineering
ETOPS
FAA
FAA Pilot's Handbook
Flight
Flying
Human Factors
ICAO
Icinig
Inspection
Instruments
International
Landing
Maintenance
Military
Navigation
NextGen
Parts
Pilot Technique
Powerplant
Regulatory
Safety
Seats
Structures
Systems
Tires
UK
Weather
Recent Posts
System Safety Assessment
Class I Navigation as described in Part 121 OpSpecs and VFR Class I Navigation
Available Landing Distance (ALD)
Auto Flight Guidance System (AFGS)
Airways Navigation Facilities
Categories
Abbreviations and Acronyms
Aircraft
Aircraft Navigation
Aircraft Powerplant
Aircraft Structure Terms
Aircraft Systems Terms
Airlines
Airports
ATC Terms
Aviation Maintenance
Aviation Safety
Aviation Terms
Aviation Weather
Avionics Terms
Definitions
FAA
Featured
ICAO
Military Aviation
News
Video
Join the Conversation