Spring Tension Chronometer

Written by Amit Sharma
Appearance of Chronometer:
  • The face of the chronometer is similar to that of an ordinary clock except for two additional, smaller dials inset on the main dial.
  • The first smaller dial shows the ‘seconds hand’ and is graduated from 0 to 60 seconds.
  • The second small dial shows number of hours elapsed since last winding of chronometer.
How winding of Chronometer is done?
  • Chronometer should be wound ever day at the same time, preferably by the same person (normally 2nd mate).

To wind the chronometer

  • Turn it over gently, face down, in the gimbal ring.
  • Hold firmly in position with the left hand.
  • Use one finger of the left hand to open the dust cover.
  • Insert the winding key and wind gently with right hand and evenly in an anti-clockwise direction. Carefully count the number of turns.
  • A two-day chronometer requires about seven half turns. It will run for a maximum period of about 54 hours without rewinding.

 Running Down

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.