Rec. ITU-R M.2092-1 3
TBB Terrestrial bulletin board
TDMA Time division multiple access
UTC Coordinated universal time
VDE VHF data exchange
VDES VHF data exchange system
VDE-SAT VHF data exchange-satellite
VDE-TER VHF data exchange-terrestrial
VDL VHF data link
VHF Very high frequency
Related ITU Recommendations, Reports
Recommendations
ITU-R M.585 – Assignment and use of identities in the maritime mobile service
ITU-R M.1084 – Interim solutions for improved efficiency in the use of the band 156-174 MHz by stations
in the maritime mobile service
ITU-R M.1371 – Technical characteristics for an automatic identification system using time-division
multiple access in the VHF maritime mobile band
Report
ITU-R M.2435 – Technical studies on the satellite component of the VHF data exchange system
The ITU Radiocommunication Assembly,
considering
a) that the International Maritime Organization (IMO) has a continuing requirement for
a universal shipborne automatic identification system (AIS);
b) that the use of a universal shipborne AIS allows efficient exchange of navigational data
between ships and between ships and shore stations, thereby improving safety of navigation;
c) that the VHF data exchange system (VDES) should use appropriate access schemes that
ensure the protection of AIS while making efficient use of the spectrum and accommodate all users;
d) that while AIS is used primarily for surveillance and safety of navigation purposes in
ship-to-ship use, ship reporting and vessel traffic services applications, a growing need for other
maritime safety related communications has developed;
e) that the VDES gives priority to AIS, and also accommodate future expansion in the number
of users and diversification of data communications applications, including vessels which are not
subject to IMO AIS carriage requirements, aids to navigation and search and rescue;
f) that the VDES has data communications capacity and technical characteristics that support
the harmonized collection, integration, exchange, presentation and analysis of marine information
on board and ashore by electronic means to enhance berth to berth navigation and related services
for safety and security at sea and protection of the marine environment,
recognizing
that the implementation of VDES ensures that the functions of digital selective calling, AIS and
voice distress, safety and calling communication (Channel 16), are not impaired,
