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White 4-foot AIS marine antenna with glossy finish and stainless steel ferrule

Digital Systems

Digital Systems 876-SW 4' AIS Antenna White

SKU CH-M661-SDVVC

A 4.5 dB gain AIS antenna with a 1.5:1.0 SWR ratio from 159-162 MHz, brass radiators, 316 stainless ferrule, and SO-239 connector

  • Meets USCG AIS frequency requirements for commercial vessels
  • Low 1.5 : 1.0 SWR ratio across 159-162 MHz band
  • 5 dB gain brass radiator with soldered connections
  • Hand-assembled in USA with 316 stainless steel ferrule
  • Mounts on 114 threaded base via SO-239 connector

Product Identity

The Digital Systems 876-SW is a 4-foot marine AIS antenna finished in white. It is built for commercial vessels that must meet USCG Automatic Identification System requirements. Hand-assembled and tested in the USA, it targets operators who need a dedicated AIS antenna with verified frequency performance.

Suitability

This antenna suits vessels installing an AIS transponder that operates within the 159-162 MHz band and requires a low 1.5 : 1.0 SWR ratio. It is not for installations needing an included coaxial cable or connectors, as the cable is not supplied. Buyers wanting a combined VHF and AIS antenna without a splitter should look elsewhere.

Deciding Specification

The antenna delivers 4.5 dB gain across the AIS band with a 1.5 : 1.0 SWR ratio from 159-162 MHz. This narrow-band tuning and gain figure determine whether the antenna matches the transponder's sensitivity and the vessel's regulatory compliance needs.

How it compares

Measured against everything we stock in Boat Audio & Electronics, at today’s prices. Recalculated every night.

Price $263.99
Pricier than about 88% of the 312 comparable items (median $69.49).

Specifications

Product
Brand nameDigital Antenna

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