Garmin GHP 20 Marine Autopilot System for Steer-by-Wire, Installation Instructions Manual

Page: 20 / 257

Max. Speed : Allows you to adjust the maximum speed of your
boat. If the value does not match the value on the helm
control, you can adjust the value.
Rudder Gain Settings
NOTE: If you set these values too high, the autopilot may
become overactive, attempting to constantly adjust the heading
at the slightest deviation. An overactive autopilot can cause
excess wear on the pump, and drain the battery at a faster-
than-normal rate.
To open the rudder gain settings, select
Menu > Setup >
Dealer Autopilot Configuration > Rudder Gains .
Gain : Allows you to adjust how tightly the rudder holds a
heading and makes turns (sailboat only).
Counter Gain : Allows you to adjust how tightly the rudder
corrects turn overshoot (sailboat only). If you set this value
too high, the autopilot can overshoot a turn when attempting
to counter the original turn.
Low Speed : Allows you to set the rudder gain for low speeds
(power boat only). This setting applies to the vessel when
operating below planing speed.
Low Speed Counter : Allows you to set the rudder gain counter-
correction for low speeds (power boat only). This setting
applies to the vessel when operating below planing speed.
High Speed : Allows you to set the rudder gain for high speeds
(power boat only). This setting applies to the vessel when
operating above planing speed.
High Speed Counter : Allows you to set the rudder gain
counter-correction for high speeds (power boat only). This
setting applies to the vessel when operating above planing
speed.
Navigation Settings
To open the navigation settings, select Menu > Setup > Dealer
Autopilot Configuration > Navigation Setup .
Fine Heading Adjustment : Allows you to set the lubber line
(heading offset) for the autopilot.
Navigation Gain : Allows you to adjust how aggressively the
autopilot eliminates cross-track error while following a Route
To pattern.
If this value is too high, the autopilot can oscillate back and
forth across the course line over long distances. If this value
is too low, then the autopilot may respond slowly in
eliminating cross-track error.
Navigation Trim Gain : Allows you to adjust the acceptable
amount of long term cross-track error while following a Route
To pattern. Only adjust this setting after the navigation gain
has been set.
If this value is too high, the autopilot will overcompensate for
cross-track error. If this value is too low, the autopilot will
allow a large long term cross-track error.
NMEA Navigation Settings
NOTE: NMEA navigation settings apply only when a NMEA
0183 GPS device is connected to the autopilot system.
To open the NMEAsettings, select Menu > Setup > Dealer
Autopilot Configuration > Navigation Setup > NMEA Setup .
NMEA Checksum : When set to Off , this setting allows you to
still use the connected NMEA 0183 GPS device if it
incorrectly calculates checksums. When set to Off , data
integrity is compromised.
Reversed XTE : Allows you to correct the steering direction if
the connected NMEA 0183 GPS device sends the incorrect
steering direction with the cross-track error signal.
Steering System Settings
To open the steering system settings, select Menu > Setup >
Dealer Autopilot Configuration > Steering System Setup .
Verify Steering Dir. : Allows you to set the direction the rudder
must move to turn the vessel to port and to starboard. You
can test and reverse the steering direction if necessary.
Rudder Sensor Settings
NOTE: Rudder sensor settings apply only when a rudder sensor
is connected to the autopilot system.
To open the rudder sensor settings, select
Menu > Setup >
Dealer Autopilot Configuration > Steering System Setup >
Rudder Sensor Setup .
Max. Port Angle : Allows you to enter the angle at which your
rudder turns furthest port.
Max. Starboard Angle : Allows you to enter the angle at which
your rudder turns furthest starboard.
Calibrate Rudder Sensor : Initiates a procedure that
establishes the maximum range of movement of the rudder
and calibrates the rudder-position sensor. If an error appears
during the calibration, the rudder-position sensor has likely
reached its limit. The sensor might not be correctly installed.
If the problem persists, you can bypass this error by moving
the rudder to the farthest position that does not report an
error.
Calibrate Rudder Center : Initiates a procedure that establishes
the center position of the rudder. You can use this calibration
if the on-screen rudder position indicator does not match the
true rudder center on your boat.
Registering Your Device
Help us better support you by completing our online registration
today.
• Go to
http://my.garmin.com .
• Keep the original sales receipt, or a photocopy, in a safe
place.
Contacting Garmin Product Support
• Go to www.garmin.com/support and click Contact Support
for in-country support information.
• In the USA, call (913) 397.8200 or (800) 800.1020.
• In the UK, call 0808 2380000.
• In Europe, call +44 (0) 870.8501241.
20