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    Re: Group Project: USCG student sample problems
    From: Hewitt Schlereth
    Date: 2013 Apr 15, 17:22 -0700
    Greg, it sounds like he is going to use HO 229. I think he is referring to Double Second Difference - used when interpolating high sights - those above 60 degrees. In 229 these sights are in italic and there is a dot alongside.


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    On Apr 15, 2013, at 3:25 PM, "Greg Rudzinski" <gregrudzinski@yahoo.com> wrote:

    Frank... What is a double second correction ?

    Greg Rudzinski

    Group Project: USCG student sample problems
    From: Frank Reed
    Date: 2013 Apr 15, 12:56 -0700
    I have volunteered NavList to work on a project. The nautical sciences department at the US Coast Guard Academy is trying to revive a basic program in celestial navigation methods after a hiatus of over 15 years. I've been contacted by Robert Kenney, an instructor there, who is looking for some sample problems based on current navigation data for 2013 if possible.

    Here's what he has asked for:
    " I am putting together a tutorial on sight reduction and need a few sample problems. The only problems I can find online are well out of date. Would you be able to provide a few problems from 2012 or preferably this year? We would like the cadets to use the nautical almanac instead of old data to give a more realistic feel to the exercise. I was hoping to find one problem for the sun, stars, moon and planet's to illustrate the differences in regards to HP, SHA and v corrections and the like." and "One problem for each the sun, moon, star (any star is fine) and planet will be more than enough to get us started. Could you also include a problem that requires a double second correction?"

    I would imagine this would generate some questions first. But feel free to dive right in with sample problems. I doubt that they're looking for ex-meridians, time sights, or lunars! Just standard "modern" celestial navigation sample problems.

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