SI-TEX NMEA0183 GNSS SAT Compass w/49′ Cable & Pole Mount

If you have an older boat with a reliable NMEA 0183 network, the SI-TEX SATCOMPASS0183 is the easiest way to add the power of satellite heading. This is an all-in-one kit that gives you a high-precision GNSS satellite compass, a standard 1-inch pole mount, and a generous 49-foot cable. The sensor is completely immune to magnetic interference, and it uses a 9-axis inertial sensor to provide a smooth, stable heading output for your autopilot and chartplotter. It is a complete, cost-effective solution in one box.

The sensor itself is built for the marine environment, with an IPX7 submersible waterproof rating. The included pole mount makes it easy to get the sensor up high with a clear view of the sky. The long 49-foot cable gives you plenty of length to run from a hardtop or arch down to your helm electronics. This kit takes the guesswork out of upgrading an NMEA 0183 system to the accuracy and reliability of a modern satellite compass.

Helm Use and Readability

This is a background sensor that makes your helm displays work better. You will not look at it, but you will see its results. Your autopilot will hold a much straighter course. Your chartplotter’s boat icon will track more accurately. If you have a radar overlay on your NMEA 0183 plotter, it will align much more cleanly with the chart. It breathes new life and accuracy into older, but still reliable, navigation systems.

Why Choose the SI-TEX NMEA0183 GNSS SAT Compass

You choose this SI-TEX satellite compass kit for its convenience and value. It is one of the most straightforward ways to add the significant benefits of satellite heading to an existing NMEA 0183 system. The fact that it includes the pole mount and a long cable in the box saves you time and money. For anyone wanting to improve their older boat’s autopilot performance without a full network overall, this kit is an excellent and practical solution.

Warranty and Support

SI-TEX covers this kit with a 2-Year Limited Warranty. For questions about wiring it into your specific NMEA 0183 device, the support team at is available to provide expert advice before you purchase. Every kit is inspected to ensure all parts—sensor, mount, and cable—are included before shipping.

Before Ordering the SI-TEX NMEA0183 GNSS SAT Compass

Before you buy, confirm your chartplotter or autopilot has an available NMEA 0183 input port. Identify a mounting location with a clear sky view and ensure the included 49-foot cable is long enough for the run. While this is a complete kit, you should be comfortable with basic NMEA 0183 wiring to connect it correctly.