Remember the navy fast boats that got lost near Iran?
 

When I heard that story I was very skeptical. The navy does not "just get lost".

Last night I had dinner with a friend who is retired military and he told me that the Russians have the capability to completely shut down GPS and other electronics and it was used on those boats.

Also, it's been used on us before but I won't get into that here.

Scary times.

That's why everyone recommended to Obama not to shut down Loran
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That unfortunate.
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I would think Loran would be just as easy to jam...
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http://foreignpolicy.com/2015/10/21/...lectronic-war/
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on board compass....boaters are mystified, bewildered, panick sets in when loss of gps..... :)