Lost Target Alarm - Simrad Maris ECDIS900 Operator's Manual

Lost Target Alarm

If the target data from AIS and radar tracking are both available, and if the association criteria
(for example position, motion) are fulfilled such that the AIS and radar information are
considered as one physical target, the activated AIS target symbol and the alphanumeric AIS
target data shall be automatically selected and displayed, with the provision of an alternative
priority in below.
The user has the option to change the default condition to the display of tracked radar targets
and shall be permitted to select either radar tracking or AIS alphanumeric data. Once a TT
target and AIS target have become associated, hysteresis shall be applied to the criteria to set
the new criteria or disassociation. For practical applications, it shall be permitted to vary the
association and disassociation criteria by up to 300 % of the default values. Association for
Class A and Class B AIS targets are permitted but the lower update rate on Class B AIS targets
may limit or prevent association.
Select option in the Target association settings
list
Selected option is displayed in target console. ( SLP/ASC )
•
Display of associated targets is done according IEC 62288.
•
Name of associated target displayed on the chart in brackets after the name of main target.
This makes possible to get access to appropriate target properties in the target table. In the
target table no association is used and data is displayed as it is.
Press button to configure Alarm when a target is lost within a given Range around ship
position. This alarm is available for both AIS and ARPA targets.
Press the Lost target button to open the dialogue
188
It's possible to choose one of 3 options:
No association
•
AIS priority association
•
ARPA priority association.
•
it's possible to change it at any time, but
only operating in the Monitoring station
mode.
distributed by LAN among planning
stations.
L T A
OST ARGET LARM
Option selected by user is