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There's a 14 mile underground submarine communications system in upper Michigan. Despite being hundreds of miles from the nearest ocean, it could contact submar
by hadlock 7y ago
There's a 14 mile underground submarine communications system in upper Michigan. Despite being hundreds of miles from the nearest ocean, it could contact submarines all over the planet: https://en.wikipedia.org/wiki/Project_Sanguine https://en.wikipedia.org/wiki/Project_Sanguine
At it's peak the system used ~3MW power plant to run the system.
- janzer 7y agoJust a note that while there are[1] 3 transmission lines of 14, 14 and 28 miles in the UP, the lines themselves were mounted on (essentially) telephone poles. The end of each line does have 1 to 3 miles of buried horizontal ground wire though and an array of 100 to 300 foot deep bore holes. [1] or at least were; the project was shutdown in 2004 and while the paths of the antenna lines still seem to be visible on satellite photos[2] it looks like the lines themselves may have been removed. [2] The transmission station itself is at https://goo.gl/maps/q5BwduBqbBpAaf1L9 https://goo.gl/maps/q5BwduBqbBpAaf1L9 with the 28 mile antenna segment running roughly north south just to the west, one 14 mile segment running east-west a little to the north of the facility and the second to the south.