Garmin GPSMAP A12, Owner'S Manual

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Guard Zone : Sets a safe zone around your boat and sounds an
alarm when anything enters the zone ( Enabling a Guard
Zone , page 33 ).
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.
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 36 ).
Antenna Configuration : Sets the radar antenna size and sets
the position in which the radar stops ( Setting a Custom Park
Position , page 36 ).
No Transmit Zone : Sets the area in which the radar does not
transmit signals ( Enabling and Adjusting a Radar No
Transmit Zone , page 32 ).
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.
Changing the Radar Mode
1
From a combination screen or SmartMode layout with radar,
select Menu > Change Radar .
2 Select a radar mode.
Autopilot
WARNING
You can use the autopilot feature only at a station installed next
to a helm, throttle, and helm control device.
You are responsible for the safe and prudent operation of your
vessel. The autopilot is a tool that enhances your capability to
operate your boat. It does not relieve you of the responsibility of
safely operating your boat. Avoid navigational hazards and
never leave the helm unattended.
Always be prepared to promptly regain manual control of your
boat.
Learn to operate the autopilot on calm and hazard-free open
water.
Use caution when operating the autopilot near hazards in the
water, such as docks, pilings, and other boats.
The autopilot system continuously adjusts the steering of your
boat to maintain a constant heading (heading hold). The system
also allows manual steering and several modes of automatic-
steering functions and patterns.
When the chartplotter is connected to a compatible Garmin
autopilot system, you can engage and control the autopilot from
the chartplotter.
For information about compatible Garmin autopilot systems, go
to www.garmin.com .
36 Autopilot