Digital Antenna 578-SW 4 AIS Antenna

The AIS Antennas by Digital Antennas are engineered to provide exceptional performance and durability for commercial vessels and marine enthusiasts alike. With a 4-foot length and a robust 4.5dB gain, these antennas ensure reliable Automatic Identification System (AIS) communication, meeting stringent USCG requirements. Handcrafted in the USA, each antenna is meticulously assembled, tested, and tuned to deliver optimal performance on the water.

Key Features of AIS Antennas

• Low SWR Ratio: Maintains a 1.5:1.0 SWR ratio across 159-162 MHz for efficient signal transmission.
• High Gain: 4.5dB gain ensures strong and clear AIS signals.
• Durable Construction: Made with powerful brass radiators and fiberglass for long-lasting performance.
• Quality Connections: Soldered connections and a power directing ferrite choke bead enhance signal integrity.
• Premium Finish: Features a high gloss urethane finish for resistance against harsh marine environments.
• Stainless Steel Ferrule: 316 stainless steel ensures corrosion resistance and durability.

Easy Installation with 500 GOLD Series

The 500 GOLD Series simplifies the installation process, making it hassle-free for both customers and installers:

Feature	Description
Mount	Standard 114 threaded base for versatile mounting options.
Connector	Gold factory-attached mini-UHF female connector with a PL-259 (UHF) adapter eliminates the need for soldering.
Cable	Includes 25 feet of low-loss, tinned braid, foil-shielded, UV-stable RG-8X marine cable for reliable connectivity.

Why Choose Digital Antennas?

Every AIS antenna is handcrafted in the USA, ensuring superior quality and performance. Our commitment to excellence means each antenna is assembled, tested, and tuned by hand, guaranteeing maximum durability and reliability for your marine communications.

Technical Specifications

Antenna Band	AIS
Color	White
Construction	Fiberglass
Ferrule Type	Stainless Steel
Length	48 inches
Box Dimensions	3"H x 3"W x 50"L
Weight	3.2 lbs
UPC	839494001619

Support and Warranty

Please note: This product may not be returned to the original point of purchase. For any issues or concerns, please contact the manufacturer directly to ensure you receive the best possible support.

Download the Quick Guide (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.