Extremely Low Frequencies

> In the summer of 1917, he was arranging various types of coil antennas at a receiver test site on the Chesapeake Bay when he accidentally dropped one of the antennas into the water. Strangely enough, the radio receiver connected to the antenna continued to provide good reception even as it sank into the bay.

is discovery ever intentional :)

Fantastic article.

I found a slightly clearer diagram of the Cutler array:

https://en.wikipedia.org/wiki/VLF_Transmitter_Cutler#Antenna

More info;

1) Extremely low frequency - https://en.wikipedia.org/wiki/Extremely_low_frequency

2) Communication with Submarines - https://en.wikipedia.org/wiki/Communication_with_submarines

"In 1975, Dr. Joseph Sharp proved that correct modulation of microwave energy can result in wireless and receiverless transmission of audible speech."