Raymarine RayNet (M) to STHS (M) 400mm Adapter Cable

Bridge the gap between your legacy marine electronics and cutting-edge Raymarine systems with this essential adapter cable. Designed for boaters who have invested in both classic C and E Series multifunction displays (MFDs) and newer RayNet-equipped devices like radars or the GPM400 sonar module, this 400mm cable ensures seamless high-speed data connectivity across generations of gear. No more compatibility headaches—just plug-and-play networking that keeps your vessel's systems talking smoothly, even in rough seas.

Whether you're upgrading your radar setup or integrating sonar capabilities, this adapter transforms older RJ45 SeaTalk-hs ports into RayNet-ready connections. It's a small component with big impact, preventing costly full-system overhauls and maximizing the lifespan of your existing equipment.

Unlock Reliable Performance On the Water

• Battle-Tested Durability: Engineered with marine-grade materials that withstand saltwater corrosion, UV exposure, and extreme temperatures, ensuring your network stays solid during long offshore trips.
• Effortless Integration: Simply connect the RayNet male end to your modern device and the SeaTalk-hs male plug to your classic MFD—no tools, no fuss, no downtime.
• High-Speed Data Flow: Maintains SeaTalk-hs gigabit speeds for real-time radar overlays, sonar returns, and instrument data without lag or signal loss.
• Compact and Flexible: At just 400mm (about 16 inches), it fits neatly in tight console spaces, reducing cable clutter on your helm.
• Peace of Mind Assurance: Backed by Raymarine's commitment to quality, giving you confidence in every voyage.

Perfect Fit for Your Setup

This adapter shines in mixed-system environments. It's tailored for:

• GPM400 Sonar Sounder Module connections to C or E Series MFDs.
• RayNet radars (like Quantum or older models) linking to classic wide or standard displays.
• Any RayNet device needing a quick hop to RJ45 SeaTalk-hs ports on legacy multifunction units.

Raymarine's ecosystem is built around expandability, and this cable exemplifies that philosophy—keeping your chartplotter, fishfinder, and radar in sync without forcing replacements.

Quick Setup for Instant Results

1. Power down all connected devices to avoid electrical glitches.
2. Plug the RayNet (male) end firmly into your newer radar, sonar module, or accessory.
3. Insert the SeaTalk-hs (male) RJ45 end into the network port on your C or E Series MFD.
4. Secure any excess cable with ties to prevent snags.
5. Power up and verify the connection via your MFD's network diagnostics—overlays should appear without delay.

Pro Tip: In humid conditions, dry connectors before plugging in to minimize condensation risks. Regular inspections keep performance peak.

Pro Tips for Optimal Marine Networking

To get the most from this adapter in your Raymarine setup:

• Avoid running cables parallel to power lines to cut electromagnetic interference.
• Use backbone terminators at network ends for stable SeaTalk-hs operation.
• For multi-device networks, prioritize radar on the main backbone for fastest updates.
• Monitor cable strain during vessel flexing—reposition if needed to prevent micro-fractures over time.

These habits extend gear life and sharpen your on-water awareness, from spotting fish arches to navigating fog with radar confidence.

Frequently Asked Questions