Multimedia Gallery
- Navigation Methods: Celestial Navigation
These watches were often more popular for their use as fashion accessories than their practical application as navigational tools.
Lines of longitude are imaginary lines circling the globe through poles. Also called meridians, they are designated in degrees east of west of a starting reference line from 0° at the prime meridian to 180° on the opposite side of the globe.
Early 1930s military version of the Gatty Drift Indicator.
Lyre crab, Northwest coast (Maoidea, Hyas Lyratus, Chorilla Longpipes)
Map of Geographical Distribution of Plants and Animals for the U.S. Exploring Expedition
Map produced by the U.S. Exploring Expedition.
Map produced by the U.S. Exploring Expedition
Marine chronometers are precise, specialized clocks for finding longitude at sea. They serve as portable time standards.
Chronometers like this one by Arnold & Dent were used on the U.S. Exploring Expedition (1838-1842).