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    9/15/2016 4:18 pm  #1

    DuncanR
    Expert

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    From: Up and down East Coast Aus
    Registered: 9/16/2015
    Posts: 470

    Optimised tracks not rounding leeward mark

    Morning all, I've not seen this before ....
    I'm running a coastal race route, about 60 miles there and back.  The leeward mark is an island, so I have a pair of marks "Island In" and "Island Out", maybe 0.3 mile apart.
    The optimised courses (4) don't observe the island marks at all, doing dramatic turns maybe 5 miles beforehand, on what looks to be a PredictWind grib area boundary.  I have weather in that grib area.
    Extend wind in time changes nothing.  Saildocs GFS as a grib source has the same issue.

    Que?

     

    9/15/2016 6:56 pm  #2

    Nick
    Moderator

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    Registered: 9/16/2015
    Posts: 2,964

    Re: Optimised tracks not rounding leeward mark

    If it is out and return, don't leave it to port or starboard ...

     

    9/16/2016 1:54 pm  #3

    DuncanR
    Expert

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    From: Up and down East Coast Aus
    Registered: 9/16/2015
    Posts: 470

    Re: Optimised tracks not rounding leeward mark

    OK NIck, worked just fine when the two leeward marks set to "Sail to".  But why?  And I've navigated that race maybe 6 times before, and not encountered the problem before?

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