Coaxial Cable - Standard Horizon Eclipse GX1300 Owner's Manual

5.2.1 Coaxial Cable

VHF antennas are connected to the transceiver by means of a coaxial cable
– a shielded transmission line. Coaxial cable is specified by its diameter and
construction.
For runs less than 20 feet (6 m), RG-58/U (about 0.25" (6 mm) in diameter),
is a good choice. For runs over 20 feet (6 m) but less than 50 feet (15 m), the
larger RG-8X or RG-213/U should be used. For cable runs over 50 feet (15 m)
RG-8X should be used. For installation of the connector onto the coaxial
cable refer to the figure below.
To get your coax cable through a fitting and into your boat's interior,
you may have to cut off the end plug and reattach it later. You can do
this if you follow the directions that are supplied with the connector.
Be sure to make good soldered connections.
GX1300 Page 9