Phase III 4' VHF/AIS Antenna
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Model # 17952219 | Mfg # 6396-AIS-RUPC # 719441200466
Phase III 4' VHF/AIS Antenna




Phase III 4' VHF/AIS Antenna

Name Value
Best Use AIS
Elements Silver-Plated
Gain 3 Decibels
Lead SO-239 Connector
Length 4'
Material Fiberglass
Warranty Details Eight Years Limited

Product Overview

Specially engineered for the extra bandwidth required by AIS transceivers, this Phase III™ antenna enables reliable communication over marine VHF frequencies.

Through close collaboration with professionals in the civil and military markets, they were able to produce the finest, highest performing marine antennas ever built. Backed by an eight-year warranty, these antennas are built to last in the harshest marine environments. 

Built for performance and durability, this flagship Phase III™ VHF antenna will stand strong against high speeds and high winds. Combining innovative construction of a ethafoam spacer system in a fiberglass radome with a sleek and luxurious appearance, this antenna is a master of VHF communication. To maximize the performance of your marine radio, choose Phase III™ products.

Key Features

  • Quality conductors: Stranded, high-quality tinned copper inner conductor maximizes signal strength
  • Ethafoam spacer system isolates the radiators from vibration and moisture for long, dependable service
  • Silver-plated elements: All Phase III™ antennas have silver-plated elements for maximum electrical efficiency that actually improves with age
  • 12-sided facet: Indexes and prevents the antenna from rotating during installation
  • Stainless steel ferrule: Polished to a high luster, versatile stainless steel ferrule assembly provides installation flexibility
  • SO-239 connector: Remove or install your Phase III antenna without re-routing coax


  • Application: Marine AIS/VHF
  • Design: Collinear-phased 5/8-wave elements
  • Length: 4'
  • Weight: 5lb.
  • Gain: 3dB
  • Connector Type: SO-239
  • Boat Length: 22' or smaller
  • UPS Shippable: Yes
  • SWR: <1.5:1 at 162 MHz
  • Bandwidth: 3 MHz within 2.0:1 VSWR
  • Impedance: 50 ohms
  • Max Input Power: 50w
  • DC Grounding: Yes
  • Warranty: Eight years


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