Garmin 4000 Series Owner's Manual page 51

Guard Zone—defines a zone either fully or partially surrounding your boat. An alarm sounds when
a detected object enters this zone. Touch
boundaries by touching
• Corner 1 (and Corner
want the first corner of the guard zone. Touch
screen where you want the other corner of the guard zone.
• Circular: Joins the guard zone to completely encompass the boat. Use
to adjust the size.
Corner 
Overlay Numbers—shows or hides cruising, navigation, fishing, or sailing numbers as on the
navigation chart (page 7).
Radar setup—accesses advanced radar settings
Targeting on the Cruising Screen
Touch the location of your target on the cruising screen to begin targeting. A green ring and a green
line appear. The green ring corresponds to the range rings to help define an object's distance from
your location. The green line corresponds to the heading line to help define an object's bearing from
your location. The intersection of the green ring and green line indicate your target. If you select a
target on the side of the screen, the radar shifts to permit easier intersection with the target. You can
reposition the radar by touching and dragging the screen.
Heading
Line
Target
(intersection)
To stop targeting and recenter your location, touch
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.
GPSMAP 5000 Series Owner's Manual
On or Off. If the guard zone is on, you can define the
Adjust Guard Zone:
2): Touch Corner 1
Corner 2
Cruising Screen - Targeting
and then touch the point on the screen where you
Corner 2 and then touch the other point on the
Circular
(page 47).
stop Pointing
or touch one of the option buttons.
u r
SInG adar
Corner 1 Corner 2
or
Target options
5