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    Re: Chart scales
    From: Magnus Sjoquist
    Date: 2011 Nov 1, 09:13 +0100
    Peter -
    1 inch = 20 nM is fairly close to standard and fit for professional ocean-astro. Full size astro plotting charts are available for purchase and they have about that scale. If you insist on not loosing any precision which you may have in your calculations, you can of course draw a plotting sheet in any scale (how to do it can be found in the archives of NavList).

    ----Ursprungligt meddelande----
    Från: pmh099@yahoo.com
    Datum: 2011-10-31 18:56
    Till: "NavList"<NavList@fer3.com>
    Ärende: [NavList] Chart scales

    In my recent LOP plotting exercises I used VP-OS sheets, on which 1 inch = 20 nautical miles.  I am curious to know whether this scale is considered somehow "standard" or whether there are any other frequently used chart scales that people work with in real life when doing CelNav.  I'd think that some scales are more suitable than others for this purpose and that this may be reflected in what paper charts have historically been available to navigators.

    Thanks for the info.

    Peter Hakel

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