Installation Manual

S6-2 89-041 Section 6 Issue 4
Route plans with positions are transmitted in RTE (Routes) and WPL (Waypoint location)
sentences. There is no update interval for these data, therefore the last updated Route plan will
be kept in memory until data are updated or the power is switched off, as the data are not kept
in the permanent memory.
The UAIS Transponder will only accept the RTE sentence if the “w” attribute is in its 4
th
field
(current Route plan). WPL sentences can be sent before or after the RTE sentence. The
Transponder supports memory space for 22 Route plan positions; inactive positions are
gradually removed from memory and replaced with new data.
Main and AUX port reception and transmission of UAIS data
Specific UAIS Transponder functions are available via the Main and AUX ports. The ports are
identical and will transmit all received VDL (VHF Data Link) messages as well as Transponder
error messages. A request for information may be sent from equipment connected to the Main
and AUX ports, ether a request for information or a request for the Transponder to carry out a
specific task. The communication protocol is text, but in non-readable sentences which contain
compressed binary data.
The Transponder Main/AUX input port can accept requests:
• To send a short text message or a small binary data array to a specified address
(MMSI) or as a broadcast message
• To send a static or voyage information request to a specified address (MMSI)
• To change AIS radio frequencies and/or parameters of access to AIS channels
(radiating power, frequency band etc.)
The Transponder Main/AUX input port can accept:
• Static and voyage related data
• Navigation or dynamic data, similar to sensors data interface
• Error situation message acknowledgement.
The Transponder Main/AUS output port can transmit:
• Notifications about every VHF message received and transmitted via AIS channels
with the VHF message included;
• Acknowledgement of requests from other stations;