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    Re: Equation of Time/Meridian
    From: John D. Howard
    Date: 2019 Dec 2, 17:53 -0800

    Mike,

    Short answer: No.  The Longitude by Noon sight is something different.

    If you search this NavList ( use TOOLS then Search ) subject " Time Sight " and change starting date to Jan 2002 you will get over 300 messages on the time sight.  A good discussion was had around Nov and Dec, 2012.

    Before about the second half of 1800s the Line of Position was not used.  Navigators got Latitude from a noon sight ( maby Polaris )  and then Longitude from the time sight. The time sight would give you local apparent time - like a very accurate sundial.  To get your longitude you would need the time at Greenwich either using a watch ( cronometer ) or by shooting a luner.  ( The luner only gave you Greenwich time, the time sight gave you longitude. )  This is where the equation of time came into play.  The watch gave Mean time, the time sight gave apparent time.  The difference is EOT.

    I am not an expert or a teacher so I urge you to read the many messages from the past.  I would start with Frank Reed's message " A time sight Primer " from Dec 24, 2012.

    John H.

       
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