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Inaccurate AIS

Discussion in 'General Yachting Discussion' started by Capt Ralph, Jul 13, 2018.

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  1. Capt Ralph, Jul 13, 2018
    #1
    Capt Ralph

    Capt Ralph Senior Member

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  2. GhostriderIII, Jul 31, 2018
    #2
    GhostriderIII

    GhostriderIII Senior Member

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    Yep. They showed my brother Freddie 450 miles away from his position.
  3. Lepke, Jul 31, 2018
    #3
    Lepke

    Lepke Member

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    GPS isn't as accurate as you think either. GPS track.JPG Boat is 83', sitting at a dock on the Columbia River with a wide open sky. I can duplicate this with other receivers and when using European and Russian versions much worse. Track was left running for a couple weeks.
  4. Pascal, Jul 31, 2018
    #4
    Pascal

    Pascal Senior Member

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    What is the scale and what is the largest error? I have never seen more than 25’/30’ sitting at the dock. Good enough for me