AIS information on radar panels
The radar data bar includes information about targets.
The targets are listed with the closest target on top, and are color coded to indicate target
status.
Calling an AIS vessel
If the system includes a VHF radio supporting DSC (Digital Select Calling) calls over NMEA
2000 or NMEA 0183, a DSC call can be initiated to other vessels from the unit.
The call option is available in the AIS vessel details dialog, and in the vessel status dialog.
Refer to "Displaying target information" on page 64.
DSC Vessel tracking
DSC (Digital Selective Calling) is a semi-automated method of requesting or receiving
position data from a vessel with a DSC VHF radio. For more information on how to use this,
refer to your VHF radio manual.
There are various types of DSC position messages, including distress calls. The type of
message made determines information sent with the call, and how the radio and MFD
respond to the incoming call.
When a DSC message has been received, the MFD will display a DSC vessel icon
on the chart panel and radar panel at the received coordinates. In addition, some
radios will send COG and SOG with the position data. This allows for correct
orientation of the icon.
When receiving a distress message you will see an alarm box informing you that a message
has been received. This can be read under the messages tab on the vessels dialog. Select the
vessels button in the toolbar to display the vessels dialog.
AIS SART
When an AIS SART (Search and Rescue Transponder) is activated, it starts transmitting its
position and identification data. This data is received by your AIS device.
If your AIS receiver is not compliant with AIS SART, it interprets the received AIS SART data as
a signal from a standard AIS transmitter. An icon is positioned on the chart, but this icon is an
AIS vessel icon.
If your AIS receiver is compliant with AIS SART, the following takes place when AIS SART data
is received:
• An AIS SART icon is located on the chart in the position received from the AIS SART
• An alarm message is displayed
If you have enabled the siren, the alarm message is followed by an audible alarm.
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Note: The icon is green if the received AIS SART data is a test and not an active message.
AIS | NSS evo3S Operator Manual
65
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