Si-Tex MDA-1 Class B AIS Transceiver with Internal GPS Antenna

Si-Tex

<h3>About SI-TEX Marine Electronics</h3><p><strong>SI-TEX Marine Electronics</strong> has been a trusted name on the water since 1975. Founded in Riverhead, New York, the company has spent over five decades engineering rugged, reliable marine electronics for a wide range of vessels — from hardworking commercial boats and sportfishing yachts to inshore skiffs, power cruisers, and sailing vessels. For over 50 years, SI-TEX has delivered rugged, reliable marine electronics built to perform where it counts — on the water, earning the trust of commercial captains, sportfishermen, cruisers, and sailors around the world.</p><h3>A Full Spectrum of Marine Electronics</h3><p>SI-TEX&apos;s lineup covers the full spectrum of modern marine electronics — professional-grade radar, high-performance echosounders, advanced MFD chartplotter/sounder/radar systems, precision GPS navigation, heading sensors, autopilots, VHF communications, and more. Whether you&apos;re marking a waypoint offshore or threading a tight inlet channel in low visibility, SI-TEX builds tools that deliver dependable performance in demanding conditions.</p><p>At the heart of the SI-TEX lineup are their Fishfinders, GPS &amp; Chartplotters — multifunction display systems that combine high-resolution sonar with full-featured electronic charting. SI-TEX charting systems are ideal for boaters who want professional-grade fishfinding with full-featured electronic charting capabilities. Models like the NavPro series offer bright touchscreen displays, integrated sounders, and preloaded coastal charts — bringing serious capability to vessels of all sizes.</p><p>For mariners who rely on situational awareness at sea, SI-TEX&apos;s <a href="/11288-si-tex-simrad-radars-autopilots-200957">Radars &amp; Autopilots</a> provide peace of mind in any conditions. SI-TEX radars are offered in different series such as the T-900 and T-2000 — the T-900 boasting sophisticated Hyper-Digital Processing (HDP) technology for improved target discrimination and detection. The SI-TEX autopilots category includes electronic modules, autopilot pumps, and mechanical drives with a built-in rudder angle sensor.</p><p>Rounding out the ecosystem, SI-TEX&apos;s Navigation Parts &amp; Accessories, <a href="/201013-steering-parts-accessories-si-tex-11288">Steering Parts &amp; Accessories</a>, and <a href="/200363-electronics-parts-accessories-si-tex-11288">Electronics Parts &amp; Accessories</a> ensure that every component of your onboard navigation system works in harmony — from transducers and GPS antennas to heading sensors and mounting hardware.</p><h3>Built-In Reliability and Support</h3><p>Every SI-TEX product is backed by a 2-Year Warranty and supported by their Long Island, New York-based Service Department, delivering the kind of customer care only a seasoned, hands-on team can provide. Known for practical innovation, SI-TEX products are designed with intuitive interfaces and straightforward installation, and are built with rugged marine-grade construction to withstand harsh environments including saltwater, vibration, and weather exposure.</p><p>Whether you&apos;re outfitting a new vessel or upgrading an aging helm, SI-TEX offers a comprehensive selection of marine electronics that balances professional-grade performance with real-world value — a combination that has kept mariners loyal to the brand for generations.</p>