How about this?
http://www.pbs.org/wgbh/nova/easter/...avigation.html
Pretty impressive.
John Cairns
"Joe" wrote in message
om...
How many ways can you Navigate?

If your any kind of Salt you will know more than a half dozen ways.

Just wish I could master English Physic navigation.

in 7 min works over, drinks are cold, dinks ready, temp is 74, wind is
perfect awesome sunset expected...........................

And we are getting 2 extra minutes of daylight...

Later!