The ZM21-477 High Gain Marine UHF CB Radio Antenna (477 MHz) is a purpose-built communications solution designed for reliable offshore and coastal vessel operations where dependable line-of-sight UHF performance is essential.
Engineered for the 477 MHz UHF CB marine band, this high-gain antenna delivers strong signal reach and improved reception performance across open water environments, supporting both commercial marine operations and recreational boating applications where clear communication is critical for safety and coordination.
With a high 8.1 dBi gain and 50W power handling, the ZM21-477 is optimised for extended range performance in marine RF conditions. The 2.1m radiator element provides efficient radiation characteristics while maintaining structural integrity in demanding wind and salt-exposure environments.
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The ZM21-477 High Gain Marine UHF CB Radio Antenna (477 MHz) is a purpose-built communications solution designed for reliable offshore and coastal vessel operations where dependable line-of-sight UHF performance is essential.
Engineered for the 477 MHz UHF CB marine band, this high-gain antenna delivers strong signal reach and improved reception performance across open water environments, supporting both commercial marine operations and recreational boating applications where clear communication is critical for safety and coordination.
With a high 8.1 dBi gain and 50W power handling, the ZM21-477 is optimised for extended range performance in marine RF conditions. The 2.1m radiator element provides efficient radiation characteristics while maintaining structural integrity in demanding wind and salt-exposure environments.
The antenna is supplied with 4.5 metres of white RG58A/U coaxial cable and a PL259 (UHF male) connector, delivered un-terminated on the antenna end to allow clean routing through vessel structures prior to final termination.
Installation flexibility is supported through compatibility with common marine mounting systems, including fold-down nylon or stainless steel bases, mast-mounted adaptor systems, and appropriate stainless steel clamp assemblies.
Designed for durability in corrosive marine environments, the ZM21-477 is well suited to fishing vessels, workboats, patrol craft, and offshore support applications requiring stable UHF CB communications.
Manufactured in Australia by ZCG Scalar, the ZM21-477 is built to deliver consistent RF performance and long-term reliability in demanding marine operating conditions.
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