Nestled deep in the Chequamegon-Nicolet National Forest in Northwest Wisconsin is the small town of Clam Lake. Clam Lake is best known for the excellent hunting and fishing in the area, and of course the herd of elk that roam the countryside. But the elk population is more of a side effect of what I’m going to talk about today. At one time this area was home to a military base and in fact, world war three could have been signaled from its location. I’m talking about Project ELF, the Navy’s program to send messages to submarines deep under water. Let’s explore Project ELF, a cold war relic that still has an impact today.

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00:00 Introduction
01:00 Communicating with Submarines VLF/ELF
03:00 Geology makes the difference
03:34 Wisconsin Test Facility
04:26 Opposition to Project Sanguine
05:06 Cold War Rebirth
06:18 Minimun Shift Keying: MSK
06:57 Antenna transmission system
07:35 Taos Hum
08:09 End of Project ELF
10:02 Visiting the ELF Site in Clam Lake
15:51 Legacy of Project ELF
16:16 Conclusion and credits