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    Re: Time from 2102-D starfinder
    From: Greg Travillian
    Date: 2002 Feb 11, 23:28 -0500

    At 10:52 AM 02/11/2002 -0500, you wrote:
    >In David Burch Starfinder book, there is an illustration showing time
    recorded on the starfinder wheel.  The caption says something like "Once
    you determine a specified time...."
    >
    >I can't find any reference to how you go about determining a specified time.
    >
    >Does anyone have a clue for me?
    
    Here is something I found in an online artillery training manual:
    
    "7-24. HAUGHT (FIELD-EXPEDIENT) METHOD FOR ORIENTING THE STAR IDENTIFIER
    This is a simple method of computing the LST for orienting the star finder
    and identifier. The results are accurate to within 1� and can be used for
    any time or location. The final result is the LST for 1900 on the date of
    observation. Use the time-arc relationship to adjust for different
    observation times. One hour is equal to 15� of shift on the star finder and
    identifier, and 4 minutes is equal to 1� of shift. To compute the LST by
    using the Haught method, follow the procedures discussed below.
    
    a. Count the number of months this year preceding the observation month.
    Multiply that number by 30.
    b. Add the observation date.
    c. Add a constant of 24.
    d. Determine the difference between the observer's longitude and the
    longitude of the central meridian of the observer's time zone. Add the
    difference if the observer is east; subtract if west.
    e. If using daylight saving time (DST), subtract 15. DST in the US is from
    the first Sunday in April to the last Sunday in October. The result is the
    LST (orienting angle) to set on the star identifier for 1900.
    f. Determine the difference between 1900 and the time of observation. (Each
    hour is equal to 15�, and each 4 minutes is equal to 10.) Add if the
    observation time is after 1900, and subtract if the observation time is
    before 1900."
    
    
                    Greg Travillian
                    gtravill{at}ocsonline.com
    
    
    

       
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