Garmin GPSMAP 8400 series, Owner'S Manual, Page: 46 / 82

From a Radar screen or the Radar overlay, select Menu >
Radar Setup > Crosstalk Rej. .
Radar Options Menu
From a radar screen, select Menu > Radar Options .
MotionScope™ : Uses the Doppler effect to detect and highlight
moving targets to help you avoid potential collisions, find
flocks of birds, and track weather formations ( MotionScope ™
Doppler Radar Technology , page 35 ). This option is only
available on Fantom models.
Pulse Exp. : Increases the duration of the transmit pulse, which
helps maximize the energy directed toward targets. This
helps to enhance the detection and identification of targets.
This option is only available on xHD radome and xHD2 open
array models.
Target Size : Adjusts the size of targets, by adjusting the pulse
compression processing. Select smaller targets for a sharp,
high resolution radar image. Select larger targets to display
larger echos for point targets, like boats and buoys. This
option is only available on Fantom models.
Echo Trails : Enables you to track the movement of vessels on
the radar screen. This option is not available on xHD open
array or HD/HD+ radome models.
Rain Clutter : Reduces the clutter caused by rain ( Adjusting
Rain Clutter on the Radar Screen , page 37 ).
VRM/EBL : Shows the variable range marker (VRM) circle and
the electronic bearing line (EBL) to allow you to measure the
distance and bearing from your boat to a target object ( VRM
and EBL , page 36 ).
Guard Zone : Sets a safe zone around your boat and sounds an
alarm when anything enters the zone ( Enabling a Guard
Zone , page 35 ).
Timed Transmit : Helps conserve power by transmitting radar
signals at set intervals.
Radar Setup Menu
From a radar screen, select Menu > Radar Setup .
Source : Selects the radar source when more than one radar is
connected to the network.
Chart Display : Shows the chart under the radar image. When
enabled, the Layers menu appears.
Orientation : Sets the perspective of the radar display.
Crosstalk Rej. : Reduces the appearance of clutter caused by
interference from another nearby radar source.
Rotation Spd. : Sets the preferred speed at which the radar
rotates. The High Speed option can be used to increase the
refresh rate. In some situations, the radar automatically
rotates at the normal speed to improve detection, for
example, when a longer range is selected or when
MotionScope or Dual range is used.
Appearance : Sets the color scheme, look-ahead speed, and
navigation appearance.
Installation : Allows you to configure the radar for the
installation, such as setting the front of the boat and the
antenna park position.
Radar Appearance Settings
From a radar screen, select Menu > Radar Setup >
Appearance .
NOTE: These settings do not apply to the radar overlay.
Bkgd. Color : Sets the color for the background.
Frgd. Color : Sets the color scheme for the radar returns.
Brightness : Sets the brightness of various radar features, such
as range rings and tracking symbols.
Look-Ahead Speed : Shifts your present location toward the
bottom of the screen automatically as your speed increases.
Enter your top speed for the best results.
Heading Line : Shows an extension from the bow of the boat in
the direction of travel on the radar screen.
Range Rings : Shows the range rings that help you to visualize
distances on the radar screen.
Bearing Ring : Shows a bearing relative to your heading or
based on a north reference, to help you determine the
bearing to an object shown on the radar screen.
Nav Lines : Shows the navigation lines that indicate the course
you have set using Route To, Auto Guidance, or Go To.
Waypoints : Shows waypoints on the radar screen.
Radar Installation Settings
Front of Boat : Compensates for the physical location of the
radar when it is not on the boat axis ( Front-of-Boat Offset ,
page 38 ).
Antenna Configuration : Sets the radar antenna size and sets
the position in which the radar stops ( Setting a Custom Park
Position , page 38 ).
No Transmit Zone : Sets the area in which the radar does not
transmit signals ( Enabling and Adjusting a Radar No
Transmit Zone , page 34 ).
Front-of-Boat Offset
The front-of-boat offset compensates for the physical location of
the radar scanner on a boat, if the radar scanner does not align
with the bow-stern axis.
Measuring the Potential Front-of-Boat Offset
The front-of-boat offset compensates for the physical location of
the radar scanner on a boat, if the radar scanner does not align
with the bow-stern axis.
1
Using a magnetic compass, take an optical bearing of a
stationary target located within viewable range.
2
Measure the target bearing on the radar.
3
If the bearing deviation is more than +/- 1°, set the front-of-
boat offset.
Setting the Front-of-Boat Offset
Before you can set the front-of-boat offset, you must measure
the potential front-of-boat offset.
The front-of-boat offset setting configured for use in one radar
mode is applied to every other radar mode and to the Radar
overlay.
1
From a Radar screen or the Radar overlay, select Menu >
Radar Setup > Installation > Front of Boat .
2
Select Up or Down to adjust the offset.
Setting a Custom Park Position
By default, the antenna is stopped perpendicular to the pedestal
when it is not spinning. You can adjust this position.
1
From the radar screen, select Menu > Radar Setup >
Installation > Antenna Configuration > Park Position .
2 Use the slider bar to adjust the position of the antenna when
stopped, and select Back .
Selecting a Different Radar Source
1 Select an option:
• From a radar screen or the radar overlay, select
Menu >
Radar Setup > Source .
• Select Settings > Communications > Preferred
Sources > Radar .
2
Select the radar source.
38 Radar