Raymarine RAY 210VHF - Manual (Page 23)

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There are several factors to consider in order to maximize the effective
communication range of the radio.
•
Since VHF transmissions are essentially Line-of-Sight, mount the antenna at
the highest possible location on the vessel and free of obstruction in order to
obtain maximum range.
•
Use an antenna with the highest possible gain characteristics.
•
If you must extend the length of the coaxial cable between the antenna and
the radio, use a coaxial cable designed for the least amount of power loss over
the entire cable length.
•
Keep the coaxial cable between the radio and antenna as short as possible.
2.4.5 Grounding
While special grounding is not generally required to VHF radiotelephone install-
ations, it is a good marine practice to properly ground all electronic equipment
to the ship's ground system. The RAY210 can be connected to ground by attach-
ing a wire to one of the RF connector screws on the unit's rear panel and then to
the nearest ship's ground connection point. The recommended wire to be used
for such grounding is #10 AWG.
The RAY210's cabinet was specifically designed and die-cast from aluminum to
insure maximum noise rejection from external sources.