[Paddlewise] Oddities of GPS

From: alex <al.m_at_3web.net>
Date: Sun, 28 Nov 2004 09:24:04 -0800
Very unusual behavior I observed a while ago in my Garmin Legend.  It showed
my location correctly on built-in world map, but erred by 9-12 minutes (about
15 miles) in latitute and longitude.  This behaviour remained the same when I
panned the map on the screen instead of actually moving myself - position of
marker on the screen map was accompanied by wrong latitude/longitude, when I
compared them to topo-map.  World map is poorly detailed, and was useless in
this area (and I couldn't use my paper-map either, being offshore, without any
specific landmarks in view - and without knowing my position).  Luckily, I've
noticed this before sailing off and simply used a compass to stay on course.
This only happened in some specific world map area - panning other areas
showed everything correct. Also, in a couple of days , when I moved about 30
miles away, everything was back to normal.  And I know for sure that this
particular section of world map was displayed with correct latitude/longitude
a year ago.   Just have no ideas what might have happened.
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Received on Sun Nov 28 2004 - 09:25:59 PST

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