Meet the Digital 578SW 4ft AIS Antenna—built to meet USCG AIS requirements for commercial vessels, delivering reliable performance with durable, marine-grade construction.
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Length: 4 ft
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Frequency performance: Low SWR of 1.5:1 across 159–162 MHz for precise AIS transmission and reception
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Gain: 4.5 dB gain to improve signal strength in busy waterways
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Connector system: 500 GOLD Series with an easy installation gold mini-UHF female connector that pairs with a PL-259 adapter for solder-free connections to AIS transponders
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Mounting: Standard 1"-14 threaded base for versatile mounting on a wide range of vessels and configurations
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Construction: Rugged marine-grade build with brass radiators, soldered connections, ferrite choke bead for power direction, high-gloss urethane finish, and a 316 stainless steel ferrule
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Cable assembly: 25' of low-loss, tinned braid, foil-shielded, UV-stable RG-8X marine cable to reduce signal loss and endure harsh marine environments
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Made in the USA: Assembled, tested, and hand-tuned for maximum performance, quality, and reliability
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Compatibility: Designed to work with all AIS transponders for dependable, marine-grade performance
The Digital 578SW 4ft AIS Antenna helps you stay compliant and connected on the water with consistent AIS coverage in busy channels and during critical operations. Its durable marine-grade build withstands salt spray and heat, while the solder-free connector system simplifies installation and reduces potential failure points. With precise frequency performance, robust cabling, and a reliable base, you gain dependable transmission and clearer AIS data to support safer navigation and regulatory compliance.
