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    Re: NO 9xx plotting sheets
    From: Peter Hakel
    Date: 2014 Jan 24, 12:39 -0800
    Lu,

    Besides making one’s own plotting sheets, pre-printed options include:

    *) VP-OS (Universal) plotting sheets:
    http://www.celestaire.com/Plotting-Accessories/Universal-Plotting-Sheets-VP-OS/vmj_estore.tpl.html
    http://mdnautical.com/plotting-sheets/19670-5910-universal-plotting-sheers-vp-os.html

    The default scale there is 20 nautical miles per inch, but you are not restricted to that.

    *) metric graph paper, suitable for “Kermit’s scale :-)” of 1 nautical mile per centimeter, which allows for more “zoomed-in” and hence more accurate plotting (resolution of 1 mm, i.e. 0.1’).

    I have used both:
    http://blog.navigation-spreadsheets.com/2013/03/08/many-body-celestial-fix-for-a-moving-vessel.aspx


    Peter Hakel



    From: Lu Abel <luabel{at}ymail.com>
    To: pmh099---.com
    Sent: Friday, January 24, 2014 10:13 AM
    Subject: [NavList] NO 9xx plotting sheets


    There are no large scale charts of the middle of the ocean, so if one is going to keep a reasonably detailed navigation plot (DR, GPS fixes, celestial shots) one needs some sort of plotting sheets.

    A long time ago the US Navy's Hydrographic Office produced a series of charts which were basically blank Mercator charts covering 3 degree intervals of latitude and 3 to 6 degrees of longitude depending on latitude.    For example, NO973 covers the band from 38 deg to 41 deg.   (I'm looking at a NO973 from a celestial course I took in the mid 1980s)

    What's happened to these plotting sheets?   I can't find a source for them despite some fairly extensive web searches.

    More important, what do people use today instead of these charts?  

    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126674


       
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