This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Cutler VLF antenna array. Diagram of one of the two identical antenna arrays at the Navy Cutler VLF transmitter facility at Cutler Maine It transmits operational orders oneway to submerged submarines worldwide at frequency of kHz with power of megawatts This type of antenna is called trideco or umbrella antenna form of capacitively