Automatic Transmitter Identification System (marine): Difference between revisions

Revision as of 21:40, 7 December 2016

Revision as of 00:43, 4 March 2017

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The database of ATIS vessel identities is maintained by the {{lang|nl|Belgisch Instituut voor Postdiensten en Telecommunicatie}}.<ref name="ofcom-atis-faq">{{cite web|url=http://licensing.ofcom.org.uk/radiocommunication-licences/ships-radio/faq/atis-faq/|title=ATIS Licensing FAQ|accessdate=5 December 2012|first1=Raq|last1=Khan|first2=James|last2=Chang|work=Radiocommunications licences|publisher=[[Ofcom]]}}</ref>

The ATIS signalling protocol is based on that used for [[Digital Selective Calling]] (DSC); with the ATIS transmissions having the format specifier field set to a value of 121.<ref name="en300698-1p1"/>{{rp|44}} While DSC transmissions take place exclusively on Channel 70, the ATIS digital signal is transmitted on the same VHF channel as the voice transmission: it lasts for 285 milliseconds after the PTT button has been released, using [[frequency modulation]] [[frequency-shift keying]] (FSK) between the frequencies of 1,300Hz300&nbsp;Hz and 2,100Hz100&nbsp;Hz at 1,200 baud.<ref name="report-1159">{{cite report|url=http://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-M.1159-1990-PDF-E.pdf|title=Report 1159: Characteristics of an Automated Identification System for VHF and UHF Transmitting Stations in the Maritime Mobile Service|year=1990|pagepages=150–158|author=Consultative Committee on International Radio Secretariat|publisher=International Telecommunication Union}}</ref>{{rp|150}} The core part of the message is transmitted using 10-bit codes; each code being formed of a 7-bit symbol followed by a 3-bit count of the number of zeros in that symbol.<ref name="en300698-1p1">{{cite report|url=http://www.etsi.org/deliver/etsi_en/300600_300699/30069801/01.04.01_60/en_30069801v010401p.pdf|work=ETSI EN 300 698-1: Electromagnetic compatibility and Radio spectrum Matters (ERM); Radio telephone transmitters and receivers for the maritime mobile service operating in the VHF bands used on inland waterways|title=Part 1: Technical characteristics and methods of measurement|issue=V1.4.1|date=December 2009|publisher=ETSI|author=ETSI Secretariat}}</ref>

==References==

{{reflist}}

{{europe-transport-stub}}

[[Category:Water transport in Europe]]

[[Category:Maritime communication]]

{{europe-transport-stub}}