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    3/05/2017 2:33 pm  #1

    Rhino
    Admiral

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    Registered: 5/17/2016
    Posts: 50

    On my way to a mark

    If I am; a) sailing toward an active mark, which variable, shows my VMG toward the active mark? Is it VMG? b) if I am sailing with no active mark, what does VMG reflect? 

    Thanks

     

    3/05/2017 4:33 pm  #2

    Ernie M
    Moderator

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    Registered: 11/05/2015
    Posts: 422

    Re: On my way to a mark

    a) VMC = Velocity made good on Course (or to next mark)

    If you don't have an active mark VMC  will show __ (blank)

    VMG will always show Velocity made good to weather as a + and Velocity made good downwind i.e. If the wind is 180 and you sail 180 at 13 (I know impossible) your VMG will read +13

    If you sail 000 at 13kts with the wind at 180 your VMG will read -13

    If you sail 090 at 13kts with the wind at 180 your VMG will read 0 (never getting to weather)
    etc

     

    3/06/2017 12:00 am  #3

    Rhino
    Admiral

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    Registered: 5/17/2016
    Posts: 50

    Re: On my way to a mark

    Thanks, that makes perfect sense.

    Is there a list of the variables somewhere, with a brief explanation of what each does?

    I am currently puzzling over, tack/gybe time loss and polar course to steer.

    I can guess what each means, but I would rather know.

       •Thread Starter
     

    3/06/2017 2:41 am  #4

    Ernie M
    Moderator

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    Registered: 11/05/2015
    Posts: 422

    Re: On my way to a mark

    Appendix A in the Help document has many.
    Some are broken down further throughout the Help doc... you can Search or ListTopic for these.
    I find opening a NumberBox and then activating Playback/Simulate can often offer some clarity

    If you want an outside source check out http://www.bandg.com/academy or http://www.ockam.com/  they often offer some pretty technical details of various terms.
    Cheers

     

     

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