thunder wrote in message
...
On Wed, 12 Oct 2005 20:45:21 +0000, Shortwave Sportfishing wrote:


They still have one out in Wisconsin and Michigan I think.

According to this, they were shut down and disassembled recently (2004).

http://en.wikipedia.org/wiki/ZEVS


The interesting thing about ELF is that it can take up to 2 hours, 53
minutes to receive one letter. The shortest is something on the order
of
15 minutes I think.

I had to do a little reading on this. My thick skull couldn't fathom why
it would take so long, interesting stuff. A general overview:

http://www.elfrad.com/clam.htm

Been a while since I read up on it. I don't think they use the ELF
system
anymore.

I think I was in error when I identified the Annapolis site as an ELF
system. (it's been a long time). I believe it was a Very Low Frequency
(VLF) system, used for the same purpose but operated at slightly higher
frequencies. The antenna structure was very different than those described
at the Wisconsin and Michigan sites and basically transmitted a ground wave.

Eisboch