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CHAPTER XXV
ELECTRONIC EQUIPMENT
a) VHF!
Every boat should have a VHF on board although it!
is not mandatory by D.O.T. regulations. The antenna must!
be installed on the mast and provision must be made for!
the antenna cable in the mast. Only the best quality!
connectors should be used on deck for the antenna!
connection. Our only recommendation, as far as VHF is!
concerned, is to avoid at all cost the old crystal type.!
b) ADF (Automatic Direction Finder) or RDF!
(Radio Direction Finder)!
These receivers have a directional antenna and can!
indicate the angle from which the signal is coming.!
It is very useful to home in on different ports, most of!
which have radio signal buoys. They can be identified by!
the frequencies on the chart. Most units can receive AM,!
FM and marine band signals and provide you with weather!
conditions and music. The difference between ADF and RDF!
is that ADF will automatically direct its antenna towards!
the beacon. With RDF, this must be done manually.!
c) SSB (SINGLE SIDE BAND)!
These units are very expensive and so is the!
installation. If you intend to install one in your!
boat, you must make sure that during construction of!
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