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Inaccurate AIS

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

  1. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
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    6,141
    Location:
    Jax FL
  2. GhostriderIII

    GhostriderIII Member

    Joined:
    May 8, 2015
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    Location:
    Iceland
    Yep. They showed my brother Freddie 450 miles away from his position.
  3. Lepke

    Lepke Member

    Joined:
    Dec 26, 2015
    Messages:
    77
    Location:
    US West Coast. Cruise NW Passage to Alaska.
    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

    Pascal Senior Member

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    Feb 29, 2008
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    3,891
    Location:
    Miami, FL
    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

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