Automatic Transmitter Identification System (marine)
The Automatic Transmitter Identification System (ATIS) is a marine VHF radio system used and mandated on navigable inland waterways 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 prefixed with the number '9'.
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 Belgisch Instituut voor Postdiensten en Telecommunicatie.[1]
The ATIS digital signal is transmitted on the same VHF channel, at 1,200 baud using frequency modulation frequency-shift keying (FSK) between the frequencies of 1,700Hz and 2,100Hz. 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.[2]
References
- ^ Khan, Raq; Chang, James. "ATIS Licensing FAQ". Ofcom. Retrieved 5 December 2012.
{{cite web}}: Unknown parameter|Work=ignored (|work=suggested) (help) - ^ ETSI Secretariat (December 2009). Part 1: Technical characteristics and methods of measurement (PDF). 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 (Report). ETSI.
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