Chronometer

Chronometer is a name for certain types of clock. It may refer to: Chronomètre of Loulié, a precursor to the metronome Chronometer watch, a highly accurate watch Marine chronometer, a timekeeper used for marine navigation, as in Longitude by chronometer Observatory chronometer, a device certified by an observatory to be extremely accurate Railroad chronometer, a specialized timepiece once used for safe operation of trains

==See also== Chronometry, the science of timekeeping Hydrochronometer, a water clock Chronograph Chronoscope