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38 GPSMAP
®
4000/5000 Series Owner’s Manual
Using Radar
USinG
radar
To stop targeting, select Stop Pointing.
Create Waypoint—marks a waypoint at the targeted object or location.
Acquire Target—assigns a MARPA (Mini Automatic Radar Plotting Aid) tag to the targeted object.
NOTE: MARPA requires the use of a heading sensor. The heading sensor must output the NMEA 0183
sentence HDM or HDG.
MARPA Target (only appears when you are targeting a tagged MARPA object)—opens the
MARPA target information window. Remove MARPA objects from this window.
MARPA Targeting
Tracking
MARPA object
Target options
MARPA object
targeted
Opens MARPA
target information
window
MARPA target
lost
Dangerous
MARPA object
Understanding the Radar Overlay Screen
Use the Radar Overlay option to overlay radar information on the Navigation chart.
Radar range
From the Home screen select Radar > Radar Overlay. The radar picture appears in orange and
overlays the Navigation chart. Use the RANGE (+/-) keys (GPSMAP 4000 series) or the and
keys (GPSMAP 5000 series) to zoom in and out. Zooming while panning the map only affects the
zoom scale of the map. The radar range remains the same. Zooming while the map is locked on the
boat (not panning) affects the zoom scale of the map and the radar range.
To access additional settings or options for the radar overlay screen, touch or press MENU. Select
Adjust Chart > Chart Setup to access the chart options. Select Radar Setup to return to the radar
setup options.