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46 GPSMAP 4000 Series Owner’s Manual
uSInG radar
usInG
radar
Target Options
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