• Digital Antenna 578-SB 4&
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Digital Antenna 578-SB 4' AIS Antenna

$402.89
$470.05
$402.89
Shipping calculated at checkout.

SKU: 29019   UPC: 839494001633

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AIS Antennas
4' Length, 4.5dB Gain

In conjunction with the USCG Automatic Identification System (AIS) requirements for commercial vessels, Digital Antenna created a series of 4 AIS antennas that meet the exacting AIS frequency requirements. Designed with a low 1.5:1.0 SWR ratio from 159-162 MHz, Digital Antennas 4.5 dB gain AIS antennas offer unsurpassed durability and performance compatible with all AIS transponders.

Customers and installers love the 500 GOLD Series easy installation connector system. The gold factory-attached mini-UHF female connector with PL-259 (UHF) adapter makes connecting to the AIS transponder easy, eliminating the need to solder connectors.

All of our antennas are made in the USA, assembled, tested and tuned by hand for maximum performance, quality and durability.

All 4' AIS Antennas Feature:


  • Powerful brass radiators


  • Soldered connections


  • Power directing ferrite choke bead


  • High gloss urethane finish


  • 316 stainless steel ferrule


  • 4.5dB gain


500 GOLD Series

  • Mount: Standard 114 threaded base


  • Connector: Gold factory-attached mini-UHF female with mini-UHF male to UHF male (PL259) adapter


  • Cable: Includes 25 of our low-loss, tinned braid, foil shielded, UV stable RG-8X marine cable


This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Truck Freight: No
Oversized: No

🚚 Shipping & Fulfillment

Many items at Lotz Outdoors ship the same day when ordered
by 2pm EST, so you can get your gear quickly for your next adventure.

Some products are fulfilled directly from our trusted
third-party partners. As a result, these items may:

• Ship separately from other items in your order

• Have different shipping rates

• Not be eligible for free shipping promotions

We work hard to keep shipping fast, reliable,
and transparent across our entire catalog, and any differences will be clearly
shown at checkout.
⚠️ Shipping restrictions

Shipping restrictions apply to certain products. By purchasing, you confirm compliance with all local, state, and federal laws.

We reserve the right to cancel any order based on our compliance policies.
⚠️ California Proposition 65 Warning

⚠️ WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

This may include but is not limited to:
- Lead and lead compounds
- Nickel and nickel compounds
- Phthalates (DEHP, DBP, BBP, etc.)
- Bisphenol A (BPA)
- Cadmium and cadmium compounds

For more information go to www.P65Warnings.ca.gov

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Digital Antenna 578-SB 4&