K1 (Marine Chronometer)

A K1 marine chronometer is a highly precise timekeeping device used at sea to determine longitude accurately. Unlike regular clocks, it’s built to maintain exact time despite changing conditions like humidity, temperature, and motion. This precision allows navigators to compare the chronometer’s time with the local solar time, calculated from celestial observations, to pinpoint their east-west position. The K1 model was a significant step in navigational history, helping sailors cross oceans safely. Its accuracy and reliability made it essential for maritime navigation before the advent of modern electronic GPS systems.