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    Re: Gnomonic Charts - Usable Zones
    From: Andrés Ruiz
    Date: 2018 Jan 22, 19:14 +0100
    Hello Stan, air navigation also used GC sailing!

    Nowadays practical use of gnomonic charts is nearly over...
    nobody improvises a GC route on the fly.
    My program, and others, can export the GC/Composite sailing data in GPX format, to be used on an ECS, ...
    Also OpenCPN has a built in tool to plot GC and obtain RL waypoints, (attached).


    yes method 2.

    Link Here is broken: http://celestialtools.webs.com/downloads
    Celestial Tools V5.5.0 (the executable as a 514KB RAR archive, released version dated 3/21/2017)
    I got 560 from http://www.usps.org/eddept/n/tools.htm#celtools

    regards!
    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/

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