Lualualei VLF transmitter site is located about 45 minutes west of Honolulu, and the giant antenna masts are easily visible at a distance when exploring that area. You can easily drive to the perimeter of the military base and get close-up view of the antennas through the fence and see not only the VLF equipment, but also HF antennas and satellite domes.
In the video we look at some of the interesting items that are easily visible, and also do simple experiment so show salt water prevents communications with submarines at typical radio frequencies because of the skin depth effect that confines electrical activity to near the surface of a conductor. We also briefly looks at HF or shortwave communications.
There is some great information about the site here: https://www.navy-radio.com/commsta/lualualei.htm and also some information in Wikipedia here https://en.wikipedia.org/wiki/Lualualei_VLF_transmitter .
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