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    Re: Cell phone time, dip at beach!
    From: Jim Thompson
    Date: 2005 Apr 10, 16:25 -0300
    I have used a rope, a level and a tape measure.  I've also stood at the waterline, shot a mental line along a level to a point up the beach from my eye height, walked to that point, and done that sequentially until reaching the sextant sight point (for a height of eye of 17' on a walkway up the beach).

    Jim Thompson
    jim3 at jimthompson dot net
    www.jimthompson.net
    --------------------
    Outgoing email scanned by Norton Antivirus

    -----Original Message-----
    From: Navigation Mailing List [mailto:NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM]On Behalf Of Zvi Doron
    Sent: April 10, 2005 2:31 PM
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject: Re: Cell phone time, dip at beach!

    The way I do it is to ask a person of a known height to stand at the water edge and sit myelf at a position up the beach where the top of their head touches the horizon. Because of dip this is probably not super accurate but appears to be good enough for pactical purposes. Trying to estimate you height above the water without a reference is more difficult than one would imagine.
    ----- Original Message -----
    Sent: 10 April 2005 15:37
    Subject: Cell phone time, dip at beach!

    HI folks! I have a few commments and questions I wish to post to List:
    1.For a while I was unable to obtain precise time therefore used cell phone time in order to make a few sun shots at beach and lo and behold time was in synch with subsequent recovered precise time! If anyone has feedback as to how cell phone time is determined I would be interested! Also thought I would pass this info along since I now know cellular time to be an excellent back-up!
    2.Dip at beach: This issue may have been batted around the List before but is there a prescribed method of determining height of eye for dip correction at beach? I would venture a guess if elevation is known at that precise spot that would be one way but I try to get as close as possible to water in order to minimize eye height.
    Thanks much your responses will be much appreciated!
    Mike Burkes
     
       
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