Digital Antenna 578-SW 4' AIS Antenna

The Digital Antenna 578-SW 4' AIS Antenna is purpose-built for serious mariners who depend on reliable vessel identification and collision avoidance data. Whether you're running a commercial fishing operation, cruising offshore, or operating a charter boat in busy shipping lanes, this AIS antenna delivers the reception performance needed to keep your crew safe.

AIS (Automatic Identification System) technology is essential for situational awareness, and this four-foot antenna is engineered to capture weak signals from distant vessels that standard marine antennas simply cannot reach. Designed by Digital Antenna, a trusted name in marine electronics for decades, the 578-SW antenna features a vertical stainless steel radiator that maximizes gain across the 161.975–162.025 MHz AIS band. The stainless steel construction resists saltwater corrosion, ensuring years of reliable service in harsh marine environments.

Installation is straightforward on most vessel structures, with standard mounting hardware included for secure deck or mast placement where it can achieve optimal sky visibility. This antenna pairs seamlessly with any NMEA-compliant AIS receiver or integrated chart plotter that operates on standard 162 MHz frequencies, making it compatible with a wide range of marine electronics.