Who used the chronometer?
The U.S. Navy was using chronometers by the 1820s, and established a Depot of Charts and Instruments in order to determine the “rate” of these instruments in 1830. This Depot would later become the U.S. Naval Observatory. Dealers in several American port cities were selling chronometers by the 1830s.
What qualifies as a chronometer?
noun. a timepiece or timing device with a special mechanism for ensuring and adjusting its accuracy, for use in determining longitude at sea or for any purpose where very exact measurement of time is required.
What is another name for chronometer?
In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for chronometer, like: timepiece, clock, hourglass, metronome, timer, watch, wristwatch, chronograph and sextant.
How did sailors calculate longitude?
Sailors used a sextant to determine their latitudinal position. Longitude lines run vertically across the globe and are used to measure distances east and west of Greenwich, England.
How accurate is a chronometer?
Today, marine chronometers are considered themost accurate portable mechanical clocks ever made. They achieve a precision of around a 0.1 second loss per day. Importantly, this equates to an accuracy that can locate a ship’s position within just 1–2 miles (2–3 km) after a month at sea.