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  •  » COG of AIS Targets is Incorrect

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    5/26/2024 8:59 am  #1

    us7070
    Expert

    Offline

    Registered: 12/06/2017
    Posts: 260

    COG of AIS Targets is Incorrect

    I am having an issue with AIS data displayed in Expedition.

    The COG values of all targets are incorrect - they are rotated right by about 10-12 degrees

    The values are correct on the Zeus

    In Expedition, the target icons do not align with their trails, and the values obtained when mousing over the target are incorrect.

    If I display my own boat's AIS icon, and mouse over it, the COG value does not agree with the value in the numbers box, it is right by 10-12 degrees.

    I get AIS through an NGT-1

    It's not a magnetic variation issue; the sense is wrong. If a target's COG is, say 100 True, it's COG where I am would be 114M, and it displays in Expedition as 126M

    I assume this is affecting the CPA calculation.

    any ideas?
     

     

    5/26/2024 2:19 pm  #2

    Nick
    Moderator

    Offline

    Registered: 9/16/2015
    Posts: 3,010

    Re: COG of AIS Targets is Incorrect

    Thanks. I see Exp is adding variation to it, only in NEMA 2000.

    Will fix asap.

     

     

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