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The Exploratorium did an exhibition on navigation a few years ago; not sure  
if there were any elements on time & navigation.  Anyhow, here's a link  to a 
little info on the exhibit:
 
_http://exploratorium.edu/cmp/travel/navigation1.html_ 
(http://exploratorium.edu/cmp/travel/navigation1.html) 
 
Bob Russell
Learning Experience Design
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