Join Date: Oct 2009
Location: Swarthmore, PA
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Re: AIS "extremely vulnerable to hackers"
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.
Funny how those news articles on "hacking" the AIS system choose to leave out these things.
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1998 Catalina 250WK Take Five (at Anchorage Marina, Essington, on the Delaware River)
1994 Mason 44 Firefly on loan from my BFF (West River, Galesville, MD)
1991 15' Trophy (Lake Wallenpaupack)
1985 14' Phantom (Lake Wallenpaupack)