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    Re: False Horizons
    From: Peter Fogg
    Date: 2005 Aug 29, 03:34 +1000

    Hi Jackie
    Yes there is. There are also tables, so once you know the distance to the
    land 'short of the horizon' you can look up a correction factor to be added
    to the dip correction. The dip adjusts for the height of the observer above
    the horizon, the other for the point where the sea meets the land short of
    the horizon. From a small boat the horizon is only about 3 nautical miles
    away so if the land is further than this no correction is needed.
    Where to find this table? There is a bible of navigation known as Bowditch.
    Its available online, and someone else may know the chapter, so you can
    download at least that part.
    From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]
    On Behalf Of jferrari
    Sent: Monday, 29 August 2005 1:16 AM
    Subject: False Horizons
    I'm new to the list and a relative beginner at practical navigation so I
    hope my question isn't too elementary.
    Recently I took a noon sight but the horizon was cut short by a spit of
    land. I took it anyway as I was curious to see how far out my LOP would be.
    It was about 1nm out. I wondered could anyone tell me if there is a formula
    relating the distance that the false horizon is from the real horizon for
    any give height of eye, and the error incurred in the LOP.
    Jackie Ferrari

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