What is a Chronometer?

Written by Amit Sharma

The chronometer is an accurate time keeping instrument carried on board.  It always shows the GMT.

Use of Chronometer Onboard

The primary use of a chronometer on board of a ship is for Astro-Navigation. Sun is the most commonly used heavenly body for this purpose. The altitude of the Sun changes rapidly and  an error of  four seconds can create an error of one nautical mile in the observed position.

Accurate time is also essential for running a ships routine and a chronometer provides such accuracy.Currently the GPS is used for both these purposes, but as an alternate measure, a chronometer is still used.

About the author

Amit Sharma

Graduated from M.E.R.I. Mumbai (Mumbai University), After a brief sailing founded this website with the idea to bring the maritime education online which must be free and available for all at all times and to find basic solutions that are of extreme importance to a seafarer by our innovative ideas.