Garmin GHC 20 - Manual (Page 3)

Introduction
WARNING
See the Important Safety and Product Information guide in the
product box for product warnings and other important
information.
You are responsible for the safe and prudent operation of your
vessel. The autopilot is a tool that will enhance your capability to
operate your boat. It does not relieve you from 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. In addition to the basic
heading-hold functionality, the system allows manual steering
and several modes of automatic-steering functions and
patterns.
You can operate the autopilot system using the helm control
device. Using the helm control, you engage and steer, set up,
and customize the autopilot system.
For information about installing, see the installation instructions
for each device.
Device Overview
À
Select to place the autopilot in standby mode and return to the
heading screen.
Á
Select to open a menu or perform the function listed above the key.
Â
Select to open the display settings menu.
Press twice to adjust the backlight.
Hold to turn off the device.
Heading Screen
The heading screen displays the status of the autopilot.
À
Autopilot status/autopilot status indicator.
"Standby" appears in yellow, and the autopilot status indicator
appears in yellow when the device is in standby mode.
"Heading Hold" appears in green, and the autopilot status indicator
appears in green when the device is in heading hold.
Á
Heading trend indicator.
Â
Actual heading (in standby mode)
Intended heading (with the autopilot is engaged)
Ã
Rudder position indicator (This functionality is available only when
a rudder sensor is connected.)
Standby Mode
CAUTION
The autopilot does not steer the boat in standby mode. You are
responsible for controlling the helm, when in standby mode.
In standby mode, you can engage the autopilot and adjust
settings.
"Standby" appears in yellow and the yellow LED indicator
appears in the upper-right corner of the screen when the device
is in standby mode.
Powerboat Autopilot Operation
Heading Hold
You can engage the autopilot heading hold function to maintain
your current heading without steering the helm.
Engaging the Autopilot
When you engage the autopilot, the autopilot takes control of
the helm and steers the boat to maintain your heading.
From the heading screen, select Engage.
"Heading Hold" appears in green at the top of the heading
screen, and a green icon appears in the upper-right corner of
the screen when the device is in heading hold. Your intended
heading shows in the center of the heading screen.
Heading Adjustment
When the autopilot is engaged, you can adjust the heading
using the keys on the helm control or using the helm if your
autopilot is equipped with Shadow Drive™ technology.
Enabling Shadow Drive
NOTE: The Shadow Drive feature is for use only on power
planing hull or power displacement hull boats.
Select Menu > Setup > User Autopilot Setup > Shadow
Drive.
Adjusting Shadow Drive Sensitivity
Select Menu > Setup > User Autopilot Setup > Shadow
Drive Sensitivity.
Adjusting the Heading with the Helm
NOTE: You must enable the Shadow Drive feature before you
can adjust the heading using the helm ( page 1 ).
Introduction 1