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Old 04-01-2023, 03:25 PM   #6
O C Diver
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
Couple of possibilities:

First, the target position appearing on your or anyone else's chart plotter is a function of the AIS's GPS on the target. Simply, a target with a faulty GPS as part of its AIS can have the target appearing on your plotter, where it's not physically located. I use to use a tablet with a built in GPS for Aquamaps. The GPS went flacky and Aquamaps had me traveling through a golf course.

Secondly, if someone is pranking, the older AIS (like I had on my charter boat) were all user programmable. All the information (including vessel name) was entered by the user. Was common to see targets with no name, an MMSI number, and occasionally a made up name.

Then there are those who leave their AIS on while the boat is going down the road.....on a trailer behind a car.

Ted
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I'm tired of fast moves, I've got a slow groove, on my mind.....
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"Slow Hand" by The Pointer Sisters
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