Wristwatch as a Compass
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You can use an analog wristwatch to locate the direction of south during daylight hours. It is assumed that you live in the Northern Hemisphere, not too close to the Equator or the North Pole. (In the Southern Hemisphere, the same procedure locates north.)
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Contributed by: S. M. Blinder (March 2011)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Snapshot 1: first point the hour hand in the direction of the Sun
Snapshot 2: then rotate the red arrow halfway between the hour hand and 12 o'clock; this should then point toward the south
Snapshot 3: confirm with compass
Permanent Citation
"Wristwatch as a Compass"
http://demonstrations.wolfram.com/WristwatchAsACompass/
Wolfram Demonstrations Project
Published: March 7 2011