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Old 10-22-2013
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Re: AIS "extremely vulnerable to hackers"

Originally Posted by TakeFive View Post
As with the other VHF channels, I would expect that the USCG has sensing equipment that can triangulate the location of the transmitters for these false signals. And since AIS needs to re-transmit its info every 2 to 10 seconds, those transmissions may actually be much EASIER to locate than a single hoax voice transmission.
Yes. Radio direction finding (RDF) is built into Rescue 21. Some USCG small boats and even Towboat/US towboats have RDF capability.

Pseudo-doppler RDF is both state-of-the-art and inexpensive. You can build one yourself for about $300US and use any FM radio for direction finding. It's fun. Some ham radio clubs have radio fox hunts that use a number of different technologies, some quite simple, to good effect.
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