Day you had no GPS on a road trip
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In 1803 when steam engine was a latest and greatest of day.
Lewis & Clark had no GPS and they on dry land now what.
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They had Sextant &? Octant (45°/90° sextant)? with Artificial Horizon (pan of water and wind shield) and a good clock had keep good time for years.
? Sextant
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?? Octant using a Peep sight only 45°/90°
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? Artificial Horizon with glass wind break
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?? ? How the Artificial Horizon was used in the 1800's on land.
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? Theodolites better than Transit
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? Hightly actuate Clock for yeas used on ships for Navigation
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This what Lewis and Clark used for first tip across America by any one.
Map of Lewis & Clark trip
More on Lewis & Clark Trip see links below.
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Dave
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davesmith1800