VLF has been off the charts for 8 hours! What's happening?
(media.greatawakening.win)
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The data rate for VLF traffic is painfully slow.
They usually just send a short code and come to periscope depth to get intel from satellite downlinks. Didn’t you ever read “The Hunt for Red October?” :)
Yes, set in a day where Wordstar is cutting edge. However, the motivation for various world powers is its silent drive.
Yeah, it’s a bit dated.
In the book they say “ELF TRANSMISSION G INDICATES OPS DIRECTIVE READY FOR YOU.” Then when the directive is ready they use the 500KW ELF station to send a “G”. Then the sub comes to periscope depth and receives the coded directive to do whatever they need to. This is so the sub is not hanging around at periscope depth and can continue with a normal patrol. It’s like an electronic tap on the shoulder.
I was involved with secure communications while I was in the service. I worked with this technology. Tom Clancy watered down capabilities a lot. The actual transmission rate during the 80's was about 8 bits/second. There are techniques to substantially increase this rate.