B&G Zeus2 Glass Helm CPU - Manual (Page 65)

MARPA targets
If the system includes a heading sensor, the MARPA function (Mini Automatic Radar Plotting
Aid) can be used to track up to ten radar targets.
You can set alarms to notify you if a target gets too close. Refer to "Radar settings" on page 66.
MARPA tracking is an important tool for collision avoidance.
Ú Note: MARPA requires heading data for both the radar and the Zeus 2 Processor.
MARPA target symbols
The system uses the target symbols shown below.
Symbol Description
Acquiring MARPA target. Typically it takes up to 10 full rotations of the scanner
Tracking MARPA target, not moving or at anchor.
Tracking and safe MARPA target with extension lines.
Dangerous MARPA target.
A target is defined as dangerous when it enters the guard zone defined on the
radar panel.
When no signals have been received within a time limit a target will be defined
as lost.
The target symbol represents the last valid position of the target before the
reception of data was lost.
Selected MARPA target, activated by positioning the cursor on the target icon.
The target will return to default target symbol when the cursor is removed.
Tracking MARPA targets
1. Position the cursor on the target on the radar image
2. Select Aquire targets from the menu
3. Repeat the process if you want to track more targets
Once your targets are identified, it may take up to 10 radar sweeps to acquire and then track
the target.
Cancelling MARPA target tracking
When targets are being tracked, the radar menu will expand to include options for cancelling
individual targets or to stop the tracking function.
Cancel tracking individual targets by selecting the target icon before activating the menu.
Viewing MARPA target information
If the pop-up is activated, you can select a MARPA target to display basic target information.
Information for the 3 MARPA targets closest to the vessel is also displayed in the data bar.
When a target is selected, detailed information for the target can be displayed from the
menu.
You can display information about all MARPA targets by using the Vessels option on the
Home page.
Radar | Zeus 2 Glass Helm 65