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AIS Message Schedule Configuration
The layout of the message schedule tab is illustrated below:
Default Messages
An AIS AtoN position report is made using AIS message #21. This message occupies two AIS slots.
The default configuration shown in proAtoN includes two message #21 schedule configurations. The
first configuration, Index 1, is the primary position reporting schedule for the transceiver. The second,
Index 2, is the alternate position reporting schedule selected when the ‘off position’ monitor is enabled
and the AtoN is determined to be off position (see section 7.3.1). If the alternate ‘off position’ schedule is
not required it can be deactivated by selecting the associated row in the message schedule table and
clicking the ‘Deactivate’ button. When deactivated the alternate schedule will be greyed out.
Additional binary data messages can be added to the schedule table by selecting the required
message type from the drop down at the top of this tab, then clicking the ‘Add’ button. The available
message types are:
•
Message #8
- For broadcast of binary data to all other stations in range. The binary data may
be provided by the extended sensor interface (if present) or third party equipment connected to
the transceiver. See section 8 for further information.
•
Message #6
- For transmission of binary data to an individual destination MMSI. The destination
MMSI is set on the ‘Real AtoN’ tab. The binary data may be provided by the extended sensor
interface (if present) or third party equipment connected to the transceiver.
•
Message #12
- For transmission of text messages to an individual destination MMSI. The
destination MMSI is set on the ‘Real AtoN’ tab. This schedule is used for transmission of alert
messages.
•
Message #14
- For broadcast of text messages to all other stations in range. This schedule is used
for transmission of alert messages.
Up to four separate schedules are available for each binary message type. Each individual schedule
has an index from 1 to 4 which is used to identify that schedule (for example, message #8 index 2).
Access Scheme Selection
The access scheme for each message must be selected as either FATDMA or RATDMA. The selection
is made by selecting the required row in the schedule table, then clicking on the current access
scheme in that row. A drop down menu will then appear in that location allowing selection of the
required access scheme.
Adding Additional Messages to the Schedule
