Accurate angle measurement has evolved over the years. One simple method is to hold the hand above the horizon with one's arm stretched out. The angular width of the little finger i… See more

Practical celestial navigation usually requires a marine chronometer to measure … See more

The celestial line of position concept was discovered in 1837 by Thomas Hubbard Sumner when, after one observation, he computed and plotted his longitude at more than one tri… See more

Celestial navigation training equipment for aircraft crews combine a simple flight simulator with a planetarium. An early example is the Link Celestial Navigation Trainer, us… See more