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Compass direction using a watch

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This is an old revision of this page, as edited by Cyfal (talk | contribs) at 01:23, 29 March 2008 (Switched sentence order to make clear the inaccuracies are not related to DST. Reformulated the DST method sentence because I think thus it's clearer because it fits with the previous description.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

It is possible to locate a compass direction using a watch. This survival technique is well-known in organisations such as the armed forces and Cub Scouts.

Using a standard watch

Using a standard 12-hour watch, such as a wristwatch, one's approximate bearings can be found as follows:

  1. Hold the watch with 12 o'clock pointing towards your left.
  2. Rotate into position so that the hour hand is pointing towards the Sun.
  3. The point halfway between the hour hand and 12 o'clock points towards the south.

There are minor inaccuracies due to the difference between local time and zone time, and due to the equation of time.

During daylight saving time, the same method can be employed using 11 o'clock instead of 12.

Specialized 24-hour watch with compass card dial

Direction-finding watch

The photograph to the left shows a specialized 24-hour watch optimized for finding directions using the Sun. With the watch set to indicate local time, the hour hand points directly at the Sun. North is indicated by the local noon position (in the Northern Hemisphere).

See also

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