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AIS Glossary
Term
Definition
AIS
Automatic Identification System
AtoN
Aid to Navigation
BeiDou
Not supported. Chinese satellite navigation system. Now expanded to BeiDou-3
and is expected to provide global services upon completion in 2020.
BIIT
Built In Integrity Test
DAC
Destination Area Code
FATDMA
Default = 235 (UK & NI) or 250 (ROI) for GLA standard message
FI
Fixed Access Time Division Multiple Access
Frequency
ITU have assigned two channels in the VHF maritime module service band.
Galileo
Not supported. European Union’s Navigational System.
GLA
General lighthouse authority
GLA AIS Message 6
Supported by SRT Carbon unit with sensor module. GLA's Application Specific
Message,which provides Aids to Navigation monitoring data for the AtoN
administration and is specified by ITU.
GLONASS
Option only available upon request from SRT. Global Navigation Satellite
System (term specific to the satellite navigation system operated by the
Russian Federation)
GNSS
Global Navigation Satellite system (general term used to refer to any satellite
navigation system)
GPS
Global Positioning System
IALA
International Association of Lighthouse Authorities (IALA-A126)
IALA A-126
IALA guidelines on the use of AIS Aids to Navigation.
IEC
International Electro-technical commission
ITU
International Telecommunication Union
MMSI
Maritime Mobile Service Identity number. A nine (9) digit number associated
with the ‘real’ AtoN.
NMEA
National Marine Electronics Association
RACON
A radar transponder used to mark navigational hazards.
RATMDA
Random Access Time Division Multiple Access
SART
Search And Rescue Transponder
SOLAS
Safety of Life at Sea
UTC
Coordinated Universal Time
VDL
VHF Data Link. Term to describe the use of VHF radio for the exchange of
digital data (VDM)
VDM
VHF Data link Message
VHF
Very High Frequency