Cancelling Targets On A Multi-Node System; Tracking Targets On A Dual Radar System - Sperry Marine Visionmaster FT ECDIS User Manual

ECDIS User Guide Targets

Cancelling Targets on a Multi-node System

A tracked target that has been acquired locally may be cancelled on the
node that is tracking it; the target will also be shown as cancelled on an
ECDIS node (providing the target is being tracked
on one node only).
Targets that are being tracked on a Radar/Chart
Radar node cannot be cancelled on an ECDIS
node. If a cancellation is attempted on a target that
is being tracked on a Radar node, by right clicking
on the target, the following semi-transparent window
informs the operator that the cancel action cannot
be performed.
When a tracked target, acquired on an ECDIS is
cancelled on the ECDIS node an Action Required
message appears warning the operator that the target
will be cancelled on all nodes on the system and that
associated AIS targets will be set to sleeping.

Tracking Targets on a Dual Radar System

On dual radar, targets are acquired as described for a single system,
providing the targets are within the tracking range (0.25NM to 40NM) for
both transceivers.
Video from both transceivers is used to track targets, with a single vector
displayed at the target position. The system displays the better of the target
information obtained, based on a combination of reported accuracy
information from the tracker, along with consideration of the number of
times video has been seen or not seen for the target.
If the target passes into a blind arc of one radar but is still visible on the
other, the target will continue to be tracked as normal without any alerts
being raised. The same limits on maximum number of targets tracked
apply as for a single radar system.
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