Installation manual

48 |
Using the radar | NSS Operator Manual
Target trails and safe rings
You can defi ne the length of the MARPA trail
making it easier to follow target movement.
A circle can be added around the MARPA target
to present the danger zone. Refer “Defi ning
dangerous vessels” on page 48.
The vessels extension lines
Sets the length of the extension lines for your vessel and for other vessels.
The length of the extension lines is either set as a fi xed distance, or to indicate the distance
the vessel will move in the selected time period.
D e  ning dangerous vessels
You can defi ne dangerous vessels based upon CPA
(Closest Point of Approach) or TCPA (Time to Closest
Point of Approach). When your vessel comes within
this distance from a vessel, the symbol will change
to the “dangerous” target symbol. An alarm will be
triggered if activated in the Alarm settings panel.
Vessel alarm settings
You can defi ne several Vessels
alarms to alert you if a target
comes within predefi ned
range limits, or if a previously
identifi ed target is lost.
Alarm ID Description
Dangerous vessel Controls whether an alarm shall be activated when a vessel
comes within the predefi ned CPA or TCPA. See Defi ning
dangerous vessels
above.
 Note: The check box controls whether the alarm pop-up box
is displayed and if the siren will sound. The CPA and TCPA
defi nes when a vessel is dangerous regardless of the enabled/
disabled state.
MARPA target lost Controls whether an alarm shall be activated when a MARPA
target is lost
MARPA unavailable Controls whether an alarm shall be activated if you do not have
the required inputs for MARPA to work (valid GPS position and
heading sensor connected to the radar server)
Radar overlay
You can overlay the Radar image on the Chart. This can help you to easily interpret the radar
image by correlating the radar targets with charted objects.
When the radar overlay is selected, basic radar operational functions are available from the
Chart panel’s menu.