Automatic Transmitter Identification System (marine): Difference between revisions

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{{Short description|Marine VHF radio system}}

The '''Automatic Transmitter Identification System''' ('''ATIS''') is a [[marine VHF radio]] system used and mandated on navigable inland [[waterway]]s in Europe for identifying the ship or vessel that made a radio transmission. The identity of the vessel is sent digitally immediately after the ship's radio operator has finished talking and releases their transceiver's [[push-to-talk]] button. A short post-transmission message is sent by the radio with the vessel identity and is in the form of an encoded [[call sign]] or [[Maritime Mobile Service Identity]], starting with number '9' and the three country-specific [[maritime identification digits]].

{{about|inland vessel transmission identification|aircraft identification system also called ATIS|Automatic terminal information service|the satellite TV protocol|Automatic Transmitter Identification System (television)}}

[[File:Maritime VHF Sailor RT144.JPG|thumb|Radio transmitter with a label indicating it will identify any transmisssions from it as coming from "PF7297" using the ATIS protocol]]

<ref name="ofcom-atis-faq" />The '''Automatic Transmitter Identification System''' ('''ATIS''') is a [[marine VHF radio]] system used and mandated on navigable inland [[waterway]]s in Europe for identifying the ship or vessel that made a radio transmission. The identity of the vessel is sent digitally immediately after the ship's radio operator has finished talking and releases their transceiver's [[push-to-talk]] button. This contrasts to the [[Automatic identification system]] (AIS) used globally on ships that transmit continuously. A short post-transmission message is sent by the radio with the vessel identity and is in the form of an encoded [[call sign]] or [[Maritime Mobile Service Identity]], starting with number '"9'" and the three country-specific [[maritime identification digits]].

ATIS use on the [[Trans-European Inland Waterway network]] and connecting waterways is mandated by the Regional Arrangement Concerning the Radiotelephone Service on Inland Waterways (RAINWAT) agreements, which also prohibit the use of [[Digital Selective Calling]] (DSC) where ATIS is required, except in some near-coastal areas, or in sea-like areas of The Netherlands.

The database of ATIS vessel identities is maintained by the {{lang[[Belgian Institute for Postal Services and Telecommunications]] <small>[[:fr:Institut belge des services postaux et des télécommunications|(fr)]] [[:nl|:Belgisch Instituut voor Postdiensten en Telecommunicatie}}|(nl)]]</small>.<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|Workwork=Radiocommunications licences|publisher=[[Ofcom]]|archive-date=24 December 2012|archive-url=https://web.archive.org/web/20121224070314/http://licensing.ofcom.org.uk/radiocommunication-licences/ships-radio/faq/atis-faq/|url-status=dead}}</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, atas 1,200the baudvoice transmission: it lasts for 285 milliseconds after the PTT button has been released, using [[frequency modulation]] [[frequency-shift keying]] (FSK) between the frequencies of 1,700Hz300&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|pages=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]]

[[cs:Automatic Transmitter Identification System]]

{{europe-transport-stub}}

[[de:Automatic Transmitter Identification System]]

[[nl:ATIS (scheepvaart)]]