Water Water Everywhere: about our water ventures and adventures
Saturday, February 2, 2019
Inexpensive AIS Receiver
Large ships and passenger boats are required to broadcast an
identification signal containing position, course, speed, destination,
and vessel dimension information to help prevent sea collisions. This
system is known as the “Automatic Identification System” or AIS for
short. There are dedicated AIS receivers intended to be used on boats,
or by hobbyists, but they can be expensive. A radio scanner, or the
cheap RTL-SDR software defined radio (or a more advanced SDR such an Airspy) can be used to receive these signals, and with the help of decoding software, ship positions can be plotted on a map
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