Digital Antenna 578-SW 4' AIS Antenna 4.5dB Gain White 500 Series

The Digital Antenna 578-SW is a professional-grade 4-foot AIS (Automatic Identification System) antenna designed to meet USCG requirements for commercial vessels. Engineered specifically for AIS frequency requirements with a low 1.5:1.0 SWR ratio from 159-162 MHz, this antenna delivers 4.5dB gain for excellent performance with all AIS transponders.

Key Features:

• 4.5dB gain for superior signal strength and range
• Powerful brass radiators with soldered connections for reliability
• Power-directing ferrite choke bead reduces interference
• High-gloss urethane finish in white for UV and weather resistance
• 316 stainless steel ferrule for corrosion resistance in marine environments
• Standard 1"-14 threaded base for universal mounting compatibility

500 GOLD Series Installation System:

• Gold factory-attached mini-UHF female connector for optimal conductivity
• Includes double mini-UHF male to UHF male (PL-259) adapter
• 25 feet of premium RG-8X marine-grade coaxial cable included
• Tinned braid construction with foil shielding for maximum signal integrity
• UV-stable cable jacket designed for harsh marine conditions
• No soldering required for quick, professional installation

Proudly made in the USA, each Digital Antenna is hand-assembled, tested, and tuned to ensure maximum performance, quality, and durability. The 578-SW provides the reliable AIS reception critical for vessel safety and navigation compliance.