Chronometer

[Sarah]

A metronome. Box chronometer. See under Box.-- Pocket chronometer, a chronometer in the form of a large watch.-- To rate a chronometer. See Rate, v. t.

[Sarah]

1. A very accurate clock.
2. A poster on a number of board with an unpredictable streak

[Sarah]

Prior to the invention of the chronometer, pirates did not have an accurate method for measuring time, without which led to them steering off course and sometimes missing their destinations entirely. The chronometer's time-keeping accuracy allowed sailors to measure the stars against specific points in time, thus giving them their longitude. This changed navigation forever by allowing sailors to stay on the correct course to their destination.

[Sarah]

A device for the telling or measurment of time; clock.

[Sarah]

A clock, basically

[Dave Paprocki]

a piece of equipment that measures time very accurately

[PussyCat]

An instrument for measuring time, especially one designed to keep accurate time in spite of motion or variations in temperature, humidity, and air pressure. Chronometers were first developed for marine navigation, being used in conjunction with astronomical observation to determine longitude.