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Communications 114<br />

communicate farther because of higher transmitter power and better<br />

antennas.<br />

VHF LOS can also be plagued by multipath interference when the direct<br />

ray and a reflected ray traveling over a slightly longer path combine at the<br />

receiver antenna so that they periodically cancel or reinforce each other<br />

(see fig. 2-6). The signal fades in and out over a period of time as a result.<br />

Fading is not as great a problem with immobile equipment because<br />

corrective action can be taken, but fading can cause significant problems<br />

when one or more of the units are mobile.<br />

Common VHF Radio Nets<br />

o Tactical (TAC)<br />

o Combat Logistics Request<br />

o Convoy Control<br />

o Artillery Conduct of Fire (Arty COF)<br />

o Tactical Air Control Party (TACP) Local<br />

o Fire Support Coordination (FSC)<br />

o Landing Force Shore Party (LFSP)<br />

o Medical Evacuation (MEDEVAC)<br />

114-5

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