The diagram right shows a typical system layout.  Click on the diagram to see it full size.

 

The hardest and most important decision in an installation is the location of the antenna.  A good location will provide a 360° view of the horizon and be on or near the case to minimize signal losses in coax.

 

On a sailboat the obvious choices are any structure on the stern that will allow the base of the antenna to be 6-8 feet above the deck or the masthead.  On a power boat a location similar to the VHF antenna will usually do.

 

If you want a masthead installation without the added weight of the die-cast aluminum case at the masthead, we recommend the addition of a bi-directional amplifier to make up for the losses in the coax run.  We can install a 1 watt amplifier in the case for $180.  Contact us for more information.

 

Ideally you will mount the antenna directly to the case, eliminating all coax.  If you have to mount the antenna remotely from the case try to minimize the distance seperating them and use a high quality coax; 400 series coax for runs up to 25 feet. If you need a smaller diameter coax for installation reasons, use 240 series coax and try to keep the run under 10 feet.