Garmin GMS 10 Marine Network Port Expander | 010-00351-00
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Garmin GMS 10 — Marine Network Port Expander
The GMS 10 is a Garmin Marine Network port expander that adds four additional Ethernet ports to your onboard Garmin network — allowing you to connect more chartplotters, radar modules, sonar modules, and other Garmin Marine Network devices than a single display’s built-in ports can support.
As Garmin helm systems grow to include multiple displays, black-box radar, sonar, and other networked devices, the GMS 10 provides the connectivity backbone to tie it all together cleanly. It integrates directly into the Garmin Marine Network without requiring additional configuration, keeping your multi-device setup simple and reliable.
Key Specifications
- Ports Added: 4 Garmin Marine Network (Ethernet) ports
- Network Type: Garmin Marine Network
- Compatible Devices: Garmin GPSMAP chartplotters and Garmin Marine Network-capable devices
- Configuration: Plug-and-play — no additional setup required
- Part Number: 010-00351-00
Parts Desk Insights
Best Use Case: The GMS 10 is the right solution when you’re building or expanding a multi-device Garmin helm and you’ve run out of Ethernet ports on your chartplotter or existing network. It’s most commonly needed on larger vessels with two or more chartplotter displays, a black-box radar module (such as the GMR xHD2), and a sonar module (such as the GSD 24) — all of which require Garmin Marine Network connections. If you’re planning a helm build with three or more networked Garmin devices, budget for the GMS 10 from the start rather than discovering the port limitation mid-install. Confirm all devices you intend to connect are Garmin Marine Network (Ethernet) compatible — NMEA 2000 devices connect separately and do not use the GMS 10.
Installation Note: Mount in a dry, accessible location near the helm electronics. Use quality shielded Ethernet cable for all connections to minimize interference in the marine environment.
Estimated Packaging: Box approximately 8" × 6" × 4" (20 × 15 × 10 cm), approx. 0.6 kg shipped.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.