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position. During this procedure, the autopilot uses the GPS 

heading information to calibrate north on the autopilot system.
If you do not have a GPS device connected, you are prompted 

to set the fine heading adjustment instead (

Setting the Fine 

Heading Adjustment

).

1

Drive your boat at cruising speed in a straight line.

2

Select an option:
• If you are performing this procedure as part of the Sea 

Trial Wizard, select 

Begin

.

• If you are performing this procedure outside of the Sea 

Trial Wizard, from the heading screen, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Setup

 > 

Compass Setup

 > 

Set North

 > 

Begin

.

3

Continue to drive the boat at cruising speed in a straight line 

and follow the on-screen instructions.

4

Select an option:
• If the calibration completes successfully, select 

Done

.

• If the calibration is not successful, repeat steps 1 through 

3.

Setting the Fine Heading Adjustment

This procedure appears only if you do not have an optional GPS 

device connected to the autopilot (

Connecting Optional NMEA 

2000 Devices to the Autopilot System

). If the autopilot is 

connected to a GPS device that has acquired a GPS position, 

you are prompted to set north instead (

Setting North

).

1

Using a handheld compass, identify north.

2

Select an option:
• If you are performing this procedure as part of the Sea 

Trial Wizard, adjust the fine heading setting until it 

matches north on the magnetic compass.

• If you are performing this calibration outside of the Sea 

Trial Wizard, from the heading screen, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Setup

 > 

Compass Setup

 > 

Fine Heading Adjustment

, and adjust the fine heading 

setting until it matches north on the magnetic compass.

3

Select 

Done

.

Testing and Adjusting the Configuration

NOTICE

Test the autopilot at a slow speed. After the autopilot has been 

tested and adjusted at a slow speed, test it at a higher speed to 

simulate normal operating conditions.

1

Drive the boat in one direction with the autopilot engaged 

(heading hold).
The boat may oscillate slightly, but it should not oscillate 

significantly.

2

Turn the boat in one direction using the autopilot and observe 

the behavior.
The boat should turn smoothly, not too quickly or too slowly.
When you turn the boat using the autopilot, the boat should 

approach and settle on the desired heading with minimal 

overshoot and oscillation.

3

Select an option:
• If the boat turns too quickly or too sluggishly, adjust the 

autopilot acceleration limiter (

Adjusting the Acceleration 

Limiter Settings

).

• If the heading hold oscillates significantly or the boat does 

not correct when turning, adjust the autopilot gain 

(

Adjusting the Autopilot Gain Settings

).

• If the boat turns smoothly, the heading hold oscillates only 

slightly or not at all, and the boat adjusts the heading 

correctly, the configuration is correct, and no further 

adjustments are necessary.

Adjusting the Acceleration Limiter Settings

1

Enable Dealer Mode (

Enabling Dealer Configuration

).

2

Select 

Menu

 > 

Setup

 > 

Dealer Autopilot Setup

 > 

Autopilot 

Tuning

 > 

Acceleration Limiter

.

3

Select an option:
• Increase the setting if the autopilot turns too quickly.
• Decrease the setting if the autopilot turns too slowly.
When you manually adjust the acceleration limiter, make 

relatively small adjustments. Test the change before making 

additional adjustments.

4

Test the autopilot configuration.

5

Repeat steps 3–4 until the autopilot performance is 

satisfactory.

Adjusting the Autopilot Gain Settings

1

Enable Dealer Mode (

Enabling Dealer Configuration

).

2

Select 

Menu

 > 

Setup

 > 

Dealer Autopilot Setup

 > 

Autopilot 

Tuning

 > 

Rudder Gains

.

3

Select an option based on the type of boat:
• If you have a sailboat, a displacement-hull powerboat, or a 

powerboat with the speed source set to 

None

, select 

Gain 

and adjust how tightly the rudder holds the heading and 

makes turns.
If you set this value too high, the autopilot may be 

overactive and attempt to constantly adjust the heading at 

the slightest deviation. An overactive autopilot can drain 

the battery at a faster-than-normal rate.

• If you have a sailboat, a displacement-hull powerboat, or a 

powerboat with the speed source set to 

None

, select 

Counter Gain

 and adjust how tightly the rudder corrects 

the turn overshoot.
If you set this value too low, the autopilot can overshoot 

the turn again when it attempts to counter the original turn.

• If you have a planing-hull powerboat with the speed 

source set to 

Tach. - NMEA 2000 or Proprietary

 or 

GPS

select 

Low Speed

 or 

High Speed

 and adjust how tightly 

the rudder holds the heading and makes turns at low 

speed or high speed.
If you set this value too high, the autopilot may be 

overactive and attempt to constantly adjust the heading at 

the slightest deviation. An overactive autopilot can drain 

the battery at a faster-than-normal rate.

• If you have a planing-hull powerboat with the speed 

source set to 

Tach. - NMEA 2000 or Proprietary

 or 

GPS

select 

Low Speed Counter

 or 

High Speed Counter

 to 

adjust how tightly the rudder corrects the turn overshoot.
If you set this value too low, the autopilot can overshoot 

the turn again when it attempts to counter the original turn.

4

Test the autopilot configuration, and repeat steps 2 and 3 

until the autopilot performance is satisfactory.

Advanced Configuration

Advanced configuration options are not available on the helm 

control under normal conditions. To access the advanced 

configuration settings of the autopilot, you must first enable 

Dealer Mode (

Enabling Dealer Configuration

).

Enabling Dealer Configuration

1

From the heading screen, select 

Menu

 > 

Setup

 > 

System

 > 

System Information

.

2

Hold the center key for 5 seconds.
Dealer Mode appears.

3

Select 

Back

 > 

Back

.

If the option for Dealer Autopilot Setup is available on the Setup 

screen, the procedure was successful.

9

Summary of Contents for GHP Reactor Hydraulic

Page 1: ...e ties Waterproof wire connectors wire nuts or heat shrink tubing and a heat gun Marine sealant Marine corrosion inhibitor spray Portable or handheld compass to test for magnetic interference Hydrauli...

Page 2: ...he mounting surface The ECU must be located within 0 5 m 19 in of the pump The cables connecting the ECU to the pump cannot be extended The ECU must be mounted in a location where it will not be subme...

Page 3: ...and should be installed near the helm control Installing the Alarm Shadow Drive The Shadow Drive must be installed properly in the hydraulic steering line and connected to the CCU cable Installing the...

Page 4: ...hole as indicated on the template to begin cutting the mounting surface 4 Using the hole saw or rotary cutting tool cut the mounting surface along the inside of the dashed line indicated on the templ...

Page 5: ...ing system Refer to the instructions provided by the manufacturer of the steering system for more specific information about bleeding the system Before you bleed the hydraulic system you should verify...

Page 6: ...bare wire connections 4 Secure the alarm with cable ties or other mounting hardware not included NMEA 2000 and the Autopilot Components NOTICE If you have an existing NMEA 2000 network on your boat it...

Page 7: ...efore performing the Dockside Wizard to avoid damaging the steering system 1 Turn on the autopilot The first time you turn on the autopilot you are prompted to complete a short setup sequence 2 If the...

Page 8: ...tion Magnetic Environment Indicates the level of distortion of the Earth s magnetic field at the mounting location A value of 100 indicates the device experiences no magnetic interference at the mount...

Page 9: ...ration is correct and no further adjustments are necessary Adjusting the Acceleration Limiter Settings 1 Enable Dealer Mode Enabling Dealer Configuration 2 Select Menu Setup Dealer Autopilot Setup Aut...

Page 10: ...ion you need to identify the transmitting Tx and receiving Rx A and B wires When connecting NMEA 0183 devices with two transmitting and two receiving wires it is not necessary for the NMEA 2000 bus an...

Page 11: ...H W D 110 x 115 x 30 mm 4 33 x 4 53 x 1 18 in Dimensions with sun cover H W D 115 x 120 x 35 5 mm 4 53 x 4 72 x 1 40 in Weight without sun cover 247 g 8 71 oz Weight with sun cover 283 g 9 98 oz Temp...

Page 12: ...nds for 5 seconds The ECU shuts down Error Lost Communication Between ECU and CCU when the autopilot is engaged Communication between the CCU and the pump has timed out The helm control beeps and auto...

Page 13: ...eds This setting applies when the vessel operates above planing speed Steering System Settings To open the steering system settings select Menu Setup Dealer Autopilot Setup Steering System Setup Verif...

Page 14: ...s GHP GHC Reactor and Shadow Drive are trademarks of Garmin Ltd or its subsidiaries These trademarks may not be used without the express permission of Garmin NMEA NMEA 2000 and the NMEA 2000 logo are...

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