GHP 12 Installation Instructions
3
GHP 12 Package Contents and tools
needed
The GHP 12 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 12 components, confirm
that your package includes the items listed below. All the components,
except the drive unit and (optional) Shadow Drive, are included in the
GHP 12 core box. The drive unit is sold separately (
are missing, contact your Garmin dealer immediately.
Record the serial number of each component in the space provided.
Main Components
The GHP 12 autopilot system consists of four main components: the
Course Computer Unit (CCU), the Electronic Control Unit (ECU), the
GHC
™
10 user control interface, and the drive unit (sold separately, see
CCu
The CCU acts as the brain of the GHP 12. The CCU contains the
sensory equipment used to determine heading. The CCU connects to the
ECU and to the GHC 10 with a single cable. The CCU also connects
to a NMEA 2000
®
network to communicate with the GHC 10, and to
optional NMEA 2000-compatible devices, such as a chartplotter and a
wind sensor (
Serial number
ECu
The ECU connects to the CCU and to the drive unit. The ECU controls
the drive unit based on information from the CCU. The ECU powers
both the CCU and the drive unit.
Serial number
GHC 10
The GHC 10 is the primary interface used to operate the GHP 12
autopilot system. Using the GHC 10, you engage and steer the GHP 12.
You also set up and customize the GHP 12 using the GHC 10.
The GHC 10 connects to a NMEA 2000 network to communicate
with the CCU. The GHC 10 also connects with optional NMEA
2000-compatible devices, such as a wind sensor, a water-speed sensor,
or a GPS device, to use advanced features of the GHP 12. If NMEA
2000-compatible devices are not available, you can connect the GHC 10
to optional NMEA 0183-compatible devices instead.
Serial number
Shadow Drive
The Shadow Drive (optional accessory) is a sensor you install in the
hydraulic steering lines of your boat. The Shadow Drive can only be
used on a boat with a hydraulic steering system.
While the GHP 12 is engaged, the Shadow Drive temporarily
disengages the autopilot when you manually take control of the helm.
When you establish a new straight line heading, the Shadow Drive
automatically reengages the autopilot
Cables and Connectors
The GHP 12 autopilot system includes multiple cables. These cables
connect the components to power, to each other, to an alarm, and to
optional devices.
CCu/ECu Interconnect Cable
This cable connects the CCU to the ECU. A portion of this cable
contains color-coded wires with bare ends. These wires connect the
CCU to the alarm and to the yellow wire from the GHC 10.
