Multimedia Gallery
- Navigation Methods: Celestial Navigation
Ferdinand Berthoud, a Swiss clockmaker serving the king of France, produced many marine clocks.
Pan American Airways navigator
This illustration is the frontispiece to The Mariner’s Mirrour, one of the most famous collections of sea charts from the 16th century.
Italian astronomer Galileo Galilei competed for two longitude prizes in the 17th century.
Italian astronomer Galileo Galilei created this device to calculate the motions of Jupiter’s moons.
In 1642, for a Dutch longitude prize, Galileo proposed both an astronomical solution and an accurate sea clock—the first clock ever to have a pendulum.
Line drawing of the prototype Gatty drift meter.
Gekkos, Malaysia (Gehyra vorax, Gekko indicus,Naultinus punctatus)
A post-war periscopic sextant often mounted this type of watch.
