User's Manual

UL-801 Installation Manual
Page A1-3
23-20-06 15 December 2011
Acronym/Abbreviation/Term Description
HS High Speed
ICAO International Civil Aviation Organization
ID Identification, Identifier
IFR Instrument Flight Rules
IOP Input/Output Processor
I/O Input/Output
LAN Local Area Network
LOS Line of Sight
LRU Line-Replaceable Unit
LS Low Speed
LSK Line Select Key
MARSA Military Assumes Responsibility for Separation of Aircraft
MCDU Multifunctional Control Display Unit (UASC)
MCDU Multi-Purpose Control Display Unit (ARINC)
MCU Modular Concept Unit
MDM Modem
MFD Multifunction Display
MIC Microphone
MSG Message
MSK Minimum Shift Keying
MVFR Marginal Visual Flight Rules
ND Navigation Display
NDA Next Data Authority
NOCOMM No Communication
NO CVG No Coverage
NVM Non-volatile Memory
ONBD Onboard
OOOI Out, Off, On, In (used to detect and report changes to the
major flight phases of the aircraft)