SI-TEX MDA-3 Metadata Zero Loss AIS Antenna Splitter

The SI-TEX MDA-3 Metadata Zero Loss AIS Antenna Splitter is purpose-built for serious mariners who demand reliable dual-channel AIS reception without signal degradation. If you run modern VHF and AIS systems aboard a cruising sailboat, fishing vessel, or commercial workboat, you know that antenna real estate is limited and every decibel counts. This splitter solves that constraint by allowing a single antenna to feed multiple receivers simultaneously while maintaining zero loss performance—critical when tracking traffic in busy waterways or monitoring emergency broadcasts.

Built into a compact, IPx7 waterproof-rated enclosure measuring 5.5" × 3.9" × 1.9", the MDA-3 leverages low-loss passive design to eliminate signal attenuation that active splitters introduce. The sealed polymer construction withstands salt spray, deck washdowns, and constant UV exposure—essential for installations exposed to the marine environment. Its small footprint allows flexible mounting on cabin tops, masts, or below-deck junction boxes without compromising accessibility or creating cable management nightmares that plague crowded engine rooms and nav stations.

Cruisers, commercial operators, and charter captains benefit most from zero-loss splitting when integrating modern chartplotters, dedicated AIS receivers, or redundant VHF systems—situations where signal dropout is unacceptable. Installation is straightforward: simply connect your primary antenna lead to the input port and route separate cables to your AIS receiver and VHF transceiver outputs. The MDA-3 pairs seamlessly with SI-TEX marine electronics and standard marine-grade connectors, making retrofit easy on vessels with existing systems. For anyone serious about navigation safety and situational awareness, this splitter delivers the performance that hours on the water demand.