
GHP 20 Installation Instructions 3
The GHP 20 autopilot system consists of multiple components.
Familiarize yourself with all of the components before beginning
installation. You must know how the components operate together in
order to correctly plan the installation on your boat.
As you familiarize yourself with the GHP 20 components, conrm that
your package includes the components identied below. If any parts are
missing, contact your Garmin dealer immediately.
Record the serial number of each component in the space provided.
The GHP 20 autopilot system consists of two main components, the
Course Computer Unit (CCU), and the GHC
™
20 user control interface.
The CCU acts as the brain of the GHP 20. The CCU contains the
sensory equipment used to determine heading. The CCU connects to the
steering system of your boat. The CCU also connects to a NMEA 2000
®
network to communicate with the GHC 20, and to optional NMEA
2000-compatible GPS devices (page 8).
The GHC 20 is the primary interface used to operate the GHP 20
autopilot system. Using the GHC 20, you engage and steer the GHP 20.
You also set up and customize the GHP 20 using the GHC 20.
The GHC 20 connects to a NMEA 2000 network to communicate
with the CCU. The GHC 20 also connects with optional NMEA
2000-compatible devices, such as a GPS device, to use advanced
features of the GHP 20. If NMEA 2000-compatible devices are
not available, you can connect the GHC 20 to optional NMEA
0183-compatible devices instead.
The GHP 20 autopilot system includes multiple cables. These cables
connect the components to power, to each other, to an alarm, and to
optional devices.
Notice
Do not connect the steering controller cable to a NMEA 2000 network.
The GHP 20 requires a powered CAN bus to communicate with the
steering controller. Ensure that the steering controller CAN bus is
properly powered and terminated. Consult the boat manufacturer if
needed.
This cable connects the CCU to the steering system of the boat. A
portion of this cable contains color-coded wires with bare ends. These
wires connect the CCU to the alarm.
The alarm provides audible alerts from the GHP 20 (page 7).
This cable can be used to connect the GHC 20 to optional
NMEA 0183-compatible devices (page 10).
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