This is a heavy-duty style marine VHF antenna with 6dB gain built to specified frequency. Please provide the specific required center frequency between the range of 122 - 300 Mhz. 

 Our HD style antennas have a VSWR at frequency of 1.15 and bandwidth of +-5MHz with a VSWR of less than 1.5

Morad VHF Marine Antennas:

1. Made entirely in the USA.
2. Hand built with modern tooling.
3. Product is tested to work before shipment.
4. Dependable, rugged, and technically superior to other antennas on the market.
5. Our products are trusted on military, law enforcement, commercial and leisure vessels around the world.