STEADYCAST™ HEADING SENSOR
Installation Instructions
Important Safety Information
CAUTION
Always wear safety goggles, ear protection, and a dust mask
when drilling, cutting, or sanding.
NOTICE
When drilling or cutting, always check what is on the opposite
side of the surface.
Registering Your Device
Help us better support you by completing our online registration
today.
• Go to my.garmin.com.
• Keep the original sales receipt, or a photocopy, in a safe
place.
Tools Needed
• Safety glasses
• Drill
• 3.2 mm (1/8 in.) drill bit (a larger pilot hole drill bit may be
required for hard or brittle mounting surfaces)
• 25 mm (1 in.) drill bit for a cable-passthrough hole (optional)
• Phillips screwdriver
• Cable ties
• Portable or handheld compass (to test for magnetic
interference)
• Additional screws appropriate for the mounting surface, if
needed
Software Update
You should update the software on all of your Garmin® devices
when you install this device.
The software update requires a Garmin NMEA 2000® Network
Updater accessory or a Garmin chartplotter connected over the
NMEA 2000 network (sold separately).
Garmin devices support up to a 32 GB memory card, formatted
to FAT32.
Loading the New Software on a Memory Card
You must copy the software update to a memory card using a
computer that is running Windows® software.
NOTE: You can contact Garmin customer support to order a
preloaded software update card if you do not have a computer
with Windows software.
Insert a memory card into the card slot on the computer.
1
Go to www.garmin.com/support/software/marine.html.
2
Select GPSMAP Series with SD Card.
3
Select Download next to GPSMAP Series with SD Card.
4
Read and agree to the terms.
5
Select Download.
6
Choose a location, and select Save.
7
Double-click the downloaded file.
8
Select Next.
9
Select the drive associated with the memory card, and select
10
Next > Finish.
A Garmin folder containing the software update is created on the
memory card. The software update can take several minutes to
load onto the memory card.
Updating the Device Software
Before you can update the software, you must obtain a
software-update memory card or load the latest software onto a
memory card.
Turn on the chartplotter.
1
After the home screen appears, insert the memory card into
2
the card slot.
NOTE: In order for the software update instructions to
appear, the device must be fully booted before the card is
inserted.
Follow the on-screen instructions.
3
Wait several minutes while the software update process
4
completes.
When prompted, leave the memory card in place and restart
5
the chartplotter manually.
Remove the memory card.
6
NOTE: If the memory card is removed before the device
restarts fully, the software update is not complete.
Mounting Considerations
CAUTION
Do not install or store the sensor near strong magnets, including
speakers. A strong magnetic field can damage the sensor.
You can install the sensor with the cable either routed through
the side of the sensor housing, or with the cable routed through
the mounting surface under the sensor.
For best performance, observe these considerations when
selecting a mounting location.
• The sensor should not be mounted near known ferrous metal
objects such as a toolbox or compass.
• The sensor is not a GPS device, and is not required to have
a clear view of the sky.
• A handheld compass should be used to test for magnetic
interference in the area where the sensor is to be mounted.
Your boat, motors, and devices must be on during the test.
If the needle on the handheld compass moves when you hold
it where you intend to mount the sensor, magnetic
interference is present. You must choose another location
and test again.
• Mounting screws are provided with the sensor. If you use
mounting hardware other than the provided screws, the
hardware must be made of quality stainless steel or brass
material to avoid magnetic interference with the sensor.
NOTE: Test all mounting hardware with a handheld compass
to make sure no magnetic fields are present in the hardware.
• The sensor can be mounted in any orientation, and is not
required to be installed in the same horizontal plane as the
boat.
NOTE: You can set the heading alignment automatically if a
GPS source is connected to the NMEA 2000 network. If you
are not using a compatible Garmin chartplotter, the boat must
be able to reach a cruising speed of at least 6.4 km/h (4
mph). You can set or fine-tune the heading alignment using
Fine Heading Alignment with a compatible Garmin
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chartplotter. If these options are not available, you must align
the heading by adjusting the sensor installation manually to
point the arrow parallel to the front of the boat.
Mounting the Sensor
You can mount the sensor with the cable along the mounting
surface or with the cable routed through the mounting surface
under the sensor.
Select a mounting location (Mounting Considerations,
1
page 1).
If you plan to route the cable through the mounting surface,
2
use a 25 mm (1 in.) drill bit to drill the cable-passthrough hole
into the mounting surface at the selected mounting location.
If necessary, route the cable through the cable passthrough
3
hole.
Using a bit appropriate for the mounting surface and
4
mounting hardware, drill two pilot holes (optional).
Secure the sensor to the mounting surface, observing these
5
guidelines for best performance:
• If you are using your own mounting hardware instead of
the included screws, test the hardware for magnetic
interference (Mounting Considerations, page 1).
• Do not use excessive force when installing mounting
screws. Use only the amount of force needed to keep the
sensor in place.
• Apply force evenly between the mounting screws.
• Install the mounting screws perpendicular to the mounting
surface (not at an angle). The heads of the screws should
rest in the center of the grooves.
Route the cable to the NMEA 2000 network.
6
If you routed the cable through the mounting surface, fill the
7
cable hole in the side of the sensor with marine sealant
(optional).
NMEA 2000 Connection Considerations
• This sensor connects to an existing NMEA 2000 network on
your boat.
• If the integrated NMEA 2000 drop cable is not long enough to
reach your NMEA 2000 network, a drop cable extension of
up to 4 m (13 ft.) can be used, according to the NMEA 2000
guidelines.
Item Description
Heading sensor
À
NMEA 2000 power cable (existing; not included)
Á
Ignition or in-line switch (existing; not included)
Â
12 Vdc power source
Ã
NMEA 2000 T-connector (included)
Ä
NMEA 2000 terminator or backbone cable (existing; not included)
Å
Calibration
After installation is complete, you must calibrate the heading
sensor for best results. Depending on the types of devices
connected to the NMEA 2000 network, you can calibrate the
sensor using either a menu-based method or a basic method.
When you connect the sensor to the same NMEA 2000 network
as a compatible Garmin chartplotter, you are prompted to begin
menu-based calibration when the chartplotter detects the new
sensor (Performing Menu-Based Calibration, page 2). Go to
www.garmin.com for a list of compatible chartplotters.
NOTE: A software update available in mid-2017 enables you to
perform menu-based calibration using a compatible chartplotter.
If your chartplotter has software that predates this update, you
must perform basic calibration.
If you connect the sensor to a NMEA 2000 network without a
compatible Garmin chartplotter, you must perform basic
calibration instead of menu-based calibration (Performing Basic
Calibration, page 3).
Performing Menu-Based Calibration
Before you can perform menu-based calibration, you must
connect the sensor to the same NMEA 2000 network as a
compatible Garmin chartplotter.
If the sensor has not been calibrated successfully, a message
appears each time you turn on a compatible Garmin chartplotter.
From the sensor calibration screen, select Compass Cal..
1
TIP: You can open the calibration page at any time by
selecting the device from Menu > Settings >
Communications > NMEA 2000 Devices.
Select Begin.
2
Follow the on-screen instructions until the compass
3
calibration is complete, taking care to keep the boat as
steady and level as possible.
The boat should not list during calibration.
If possible, you can turn the vessel in place by engaging two
engines in opposite directions.
When the compass calibration is complete, a value appears
near the Compass Cal. setting. A value near 100 indicates
the sensor was installed in a perfect magnetic environment
and calibrated correctly. If the heading performance is
unacceptable, and the value is closer to 0 than it is to 100,
you might need to relocate the sensor and calibrate the
compass again.
Select Auto Heading Alignment.
4
NOTE: Auto Heading Alignment is available only if there is a
GPS source connected to the NMEA 2000 network. If you do
not have a GPS source connected, you must perform the
Fine Heading Alignment instead (Adjusting the Fine Heading
Alignment, page 2).
Select Begin.
5
Follow the on-screen instructions until the alignment is
6
complete.
Adjusting the Fine Heading Alignment
If you do not have a GPS source connected to the NMEA 2000
network, Auto Heading Alignment is not available as part of
menu-based calibration, and you must adjust the Fine Heading
Alignment instead.
You can adjust the Fine Heading Alignment in conjunction with
Auto Heading Alignment to fine-tune the heading output
(optional).
From the sensor calibration screen, select Fine Heading
1
Alignment.
Using a landmark or a known good compass, determine the
2
heading of your boat.
Adjust the heading until it matches your measurement.
3
2