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 CAUTION

The boat must be below planing speed when using this pattern.

1

Select Menu > Pattern Steering > Williamson Turn > Engage.

2

Select an option:
• Select 

 to begin a starboard turn.

• Select 

 to begin a port turn.

Cancelling a Steering Pattern

• Physically steer the boat.
• Select <<10° <1° or 1°> 10°>>.
• Select STBY.

GPS Steering Patterns

 WARNING

You are responsible for the safe operation of your boat. Do not begin a GPS

pattern until you are certain that the water is clear of obstacles.

The autopilot can steer the boat along a route defined by your GPS device or in

preset patterns based on a GPS location (waypoint). To use GPS steering, you

must have a compatible GPS device connected to the autopilot using NMEA

2000® or NMEA® 0183. GPS steering patterns are based on a GPS waypoint to

which you are actively navigating using your optional GPS device. This waypoint

is called the active waypoint.

Following a GPS Steering Route

The autopilot can steer the boat according to a route defined on a compatible

GPS device.

1

Create and navigate a route on your GPS device.

2

Select Menu > GPS Steering > Follow Route.

Cancelling a GPS Steering Pattern

• Physically steer the boat.

• Select <<10° <1° or 1°> 10°>>.
• Select STBY.

Route To

NOTE: The autopilot must be connected to a NMEA 2000 or NMEA 0183

compatible chartplotter to use Route To.
When you use the Route To feature, the autopilot steers the boat according to a

route defined on your chartplotter.
Following a Route To Pattern

Before you can begin following a Route To pattern, you must define a route on

your chartplotter. Refer to the owner’s manual included with your chartplotter for

information on how to define a route.

Select Menu > GPS Steering > Route To.

Orbit Pattern

The orbit pattern steers the boat in a continuous circle around the active

waypoint. The size of the circle is defined by your distance from the active

waypoint when you begin the orbit pattern.
Following an Orbit Pattern

1

Select Menu > GPS Steering > Orbit > Engage.

2

Select an option:
• Select 

 to begin a clockwise turn.

• Select 

 to begin a counter-clockwise turn.

Cloverleaf Pattern

The cloverleaf pattern steers the boat to repeatedly pass over an active waypoint.

When you begin the cloverleaf pattern, the autopilot drives the boat toward the

active waypoint and begins the cloverleaf pattern.

Setting Up the Cloverleaf Pattern

You can adjust the distance from the waypoint at which the autopilot turns your

boat for another pass over the waypoint. The default setting turns the boat at a

range of 1000 ft. (300 m) from the active waypoint.

4

Powerboat Autopilot Operation

DRAFT

Summary of Contents for GHC 20

Page 1: ...GHC 20 Owner s Manual March 2013 190 01610 00_0A Printed in Taiwan D R A F T ...

Page 2: ...hanges or improvements Go to www garmin com for current updates and supplemental information concerning the use of this product Garmin and the Garmin logo are trademarks of Garmin Ltd or its subsidiaries registered in the USA and other countries GHC 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 ...

Page 3: ...ings 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 Operate the autopilot system using the helm control device Using the helm control you engage and steer set up and customize the aut...

Page 4: ...f 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 Adjusting the Heading with the Helm NOTE When you manually maintain a specific heading for a few seconds the autopilot resumes control of the new heading With the autopilot engaged manually s...

Page 5: ...les pattern steers the boat in a continuous circle in a specified direction and at a specified time interval Setting Up the Circles Pattern 1 Select Menu Pattern Steering Circles Time 2 Select or to set the time 3 Select Done Following the Circles Pattern 1 Select Menu Pattern Steering Circles Engage 2 Select an option Select to begin a clockwise turn Select to begin a counter clockwise turn U Tur...

Page 6: ...Y Route To NOTE The autopilot must be connected to a NMEA 2000 or NMEA 0183 compatible chartplotter to use Route To When you use the Route To feature the autopilot steers the boat according to a route defined on your chartplotter Following a Route To Pattern Before you can begin following a Route To pattern you must define a route on your chartplotter Refer to the owner s manual included with your...

Page 7: ... the autopilot controls only the rudder You and your crew remain responsible for the sails while the autopilot is engaged In addition to heading hold you can use the autopilot to maintain a wind hold You can also use the autopilot to control the rudder while tacking and gybing Wind Hold You can set the autopilot to maintain a specific bearing relative to the current wind angle Your device must be ...

Page 8: ...o any crew or passengers during an unexpected gybe maneuver Device Configuration User Autopilot Settings Select Menu Setup User Autopilot Setup Power Mode Sets the device power mode to normal or economy mode Economy power mode allows you to set the percentage of power used to run the autopilot Power Saver Sets the percentage of power used to run the autopilot when the device is in economy power mo...

Page 9: ...ettings with other devices across the NMEA 2000 network System Settings Select Menu Setup System Units Sets the units of measure Heading Sets the reference used in calculating heading information Variance Adjusts the variance from true north This setting is only available when the heading is set to True Beeper Sets if and when audible sounds are used Auto Power Automatically turns on the autopilot...

Page 10: ...D R A F T ...

Page 11: ...D R A F T ...

Page 12: ...0800 023 3937 035 539 3727 47 815 69 555 00800 4412 454 44 2380 662 915 35 1214 447 460 34 902 007 097 46 7744 52020 Garmin International Inc 1200 East 151st Street Olathe Kansas 66062 USA Garmin Europe Ltd Liberty House Hounsdown Business Park Southampton Hampshire SO40 9LR UK Garmin Corporation No 68 Zhangshu 2nd Road Xizhi Dist New Taipei City 221 Taiwan R O C 2013 Garmin Ltd or its subsidiarie...

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