KJM

KJM Marine: Precision Communication Equipment for the Water

KJM is a dedicated marine electronics manufacturer with over three decades of experience designing communication and camera equipment built to endure the punishing demands of the marine environment. KJM has earned a strong reputation among boaters, commercial operators, and marine electronics professionals for producing products that deliver reliable performance where it matters most — out on the water.

The brand's core focus is on keeping mariners connected and informed. KJM VHF Commercial Duty Antennas are engineered with copper and brass elements for maximum signal efficiency, enclosed in UV-resistant, thick-walled fiberglass radomes with stainless steel ferrules. Whether you're running a charter operation or heading offshore for a weekend, KJM's antenna lineup spans compact 3-foot models all the way to 17-foot, 9 dB high-gain antennas for extended range communications.

For mariners using Automatic Identification System technology, KJM AIS Antennas are designed to work seamlessly as stand-alone AIS receivers or in combination VHF/AIS installations when paired with a splitter. These antennas use low-loss RG-8/X cable and high-quality solder-type connectors to ensure a professional, corrosion-resistant installation with no signal degradation.

A strong antenna is only as good as its mount and cabling. KJM's Fixed Antenna Mounts provide a stable, secure platform for any KJM antenna, built from materials that resist salt, UV exposure, and vibration — all common failure points in the marine setting. Paired with KJM Coax Cables & Extensions, boaters can extend their antenna runs while minimizing signal loss. KJM extension cables use low-loss RG-8X coax terminated with FME connectors, making them a natural match for the brand's own antenna lineup.

Beyond radio communications, KJM also produces shipboard camera systems and accessories. The brand's Inspection Camera Cables are part of an integrated video system, offering combination video and power cables designed specifically for marine camera installations.

Across every product category, KJM backs its products with a 5-year warranty — a strong statement of confidence in the build quality of their equipment. For anyone building or upgrading a marine communication system, KJM offers a cohesive, well-engineered ecosystem of antennas, mounts, and cabling that work together right out of the box.