
GNT™ 10 Installation Instructions
The GNT 10 connects to an existing NMEA 2000® network on 
your boat, and provides the ability to transmit network data over 
the wireless ANT network to compatible Garmin® products, such 
as the quatix® series marine smartwatches. The Connect IQ 
app is required to view data from the GNT 10. Download the app 
from apps.garmin.com or the app store on your smartphone.
Additional GNT 10 devices can be installed on your NMEA 2000 
network to provide a larger coverage area on your boat.
Important Safety Information
 WARNING
See the Important Safety and Product Information guide in the 
product box for product warnings and other important 
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.
Mounting Considerations
NOTICE
This device should be mounted in a location that is not exposed 
to extreme temperatures or conditions. The temperature range 
for this device is listed in the product specifications. Extended 
exposure to temperatures exceeding the specified temperature 
range, in storage or operating conditions, may cause device 
failure. Extreme-temperature-induced damage and related 
consequences are not covered by the warranty.
When selecting a mounting location, observe these 
considerations.
• Metal and other dense materials may inhibit communication 
between this device and Garmin wireless marine devices. 
The intended mounting location must be tested to make sure 
this device reliably communicates with your wireless devices 
everywhere you plan to use them on the boat.
• You can use the included screws to mount the device on your 
boat. If the included screws are not appropriate for the 
mounting surface, suitable hardware must be purchased 
separately.
Mounting the Device
Determine the mounting location.
1
Using the device as a template, mark the two pilot hole 
2
locations on the mounting surface. 
Using a 1/8 in. (3 mm) bit, drill the pilot holes.
3
Use the included screws to attach the device to the mounting 
4
surface.
NMEA 2000 Connection Considerations
• This device connects to an existing NMEA 2000 network on 
your boat.
™
• If you are unfamiliar with NMEA 2000, you should read the 
“NMEA 2000 Network Fundamentals” chapter of the 
Technical Reference for NMEA 2000 Products, available on 
the Garmin web site. Click the “Manuals” link on the product 
page for your device at www.garmin.com.
• If the cable connected to the device is not long enough to 
reach your NMEA 2000 network, an extension of up to 16.5 
ft. (5 m) can be used, according to the NMEA 2000 
guidelines.
Item Description
GNT 10 device
NMEA 2000 power cable (existing; not included)
Ignition or in-line switch (existing; not included)
12 Vdc power source
NMEA 2000 terminator or backbone cable (existing; not included)
NMEA 2000 T-connector (included)
Status LED
The device has a two-color LED that you can use to 
troubleshoot problems, if necessary. The LED is labeled 
STATUS on the device.
Color State Status
Green Flashing The device is working correctly.
Green Solid The device software is being updated.
Red Flashing 
slowly
Red Flashing 
quickly
The device is starting up. If the LED does not 
change to flashing green after a short time, 
the device may not be not working correctly. 
A software update using a Garmin 
chartplotter connected to the same NMEA 
2000 network may correct the problem.
The device is not receiving NMEA 2000 data. 
The NMEA 2000 network should be checked 
for proper installation and operation.
Specifications
Specification Measurement
Dimensions (W×H×D) 55/16 × 251/64 × 111/16 in. (135 × 71 × 26 
Weight 6.63 oz. (188 g)
Temperature range From 5° to 158°F (from -15° to 70°C)
Material Fully gasketed, high-impact plastic, 
Compass-safe distance 1.97 in. (50 mm)
NMEA 2000 LEN @ 
9 Vdc
mm)
waterproof to IEC 60529 IPX7 standards
1
GUID-1F63069F-4925-48E0-9054-0492F39BCD7E v3February 2020

NMEA 2000 PGN Information
Transmit and Receive
PGN Description
059392 ISO acknowledgment
060928 ISO address claim
126208 NMEA®: Command, request, and acknowledge group function
Transmit
PGN Description
126464 Transmit PGN list group function
126996 Product information
Receive
PGN Description
059904 ISO request
127250 Vessel heading
127258 Magnetic variance
127488 Engine parameters: Rapid update
127489 Engine parameters: Dynamic
127505 Fluid level
127508 Battery status
128259 Speed: Water referenced
128267 Water depth
129025 Position: Rapid update
129026 COG and SOG : Rapid update
129029 GNSS position data
129283 Cross track error
129284 Navigation data
129285 Navigation route and waypoint info
130306 Wind data
130312 Temperature
130314 Actual pressure
© 2013 Garmin Ltd. or its subsidiaries 
Garmin® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, 
registered in the USA and other countries. GNT™ and quatix® are trademarks of Garmin 
Ltd. or its subsidiaries. These trademarks may not be used without the express 
permission of Garmin.
NMEA 2000® and the NMEA 2000 logo are registered trademarks of the National Marine 
Electronics Association.
© 2013 Garmin Ltd. or its subsidiaries
support.garmin.com