If the sleeping filtering function is activated, the following range values are displayed in the
target console:
•
Filtering range value
•
Maximum distance of AIS target at the moment, that is sent form the Sensor monitor.
Target association
According the ARPA regulation an automatic target association function is provided based
on harmonized criteria. When the function is enabled, it avoids the presentation of two full
target symbols for the same physical target.
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.
Automatic Identification System (AIS)
| ECDIS900 Operator Manual
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