NVIS is much more than a curiosity or a fallback for those who do not have tall towers. It is a strategic operating method designed to fill the gap between ground wave communications and long-distance, low-angle communications.
In amateur radio, the skip zone (also known as the “dead zone”) is the region where communication is impossible because the transmitter’s signal cannot reach the receiver through any propagation mode.
In conventional HF configurations, the “skip zone” can produce a communication void ranging from 30 to 300 miles. Ironically, in emergency situations or for regional coordination, it is in the skip zone that your most critical contacts are. NVIS eliminates this problem by radiating energy upwards, bouncing it back from the ionosphere, and bathing it back down like a floodlight.
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