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Use a watch to estimate south
In the Northern Hemisphere, an analog watch and the sun can give a rough direction estimate. This is a learning exercise, not a replacement for a map and compass. Latitude, season and clock settings affect it. Practice near home, where the result cannot decide your route.
Grab first
- An analog watch or a drawn clock showing local standard time
- A known outdoor spot near home
- Your normal map and compass for real navigation
Before you start
- Use this Northern Hemisphere method outside tropical areas. Near the tropics, it can give misleading results at some times of year.
- Do not stare at the sun. Estimate its direction from shadows. Do not use this rough method when accurate navigation matters.
The steps
Use local standard time
Check the watch's time for your location. If daylight saving time is in use, set a practice dial one hour behind the current clock time.
Hold the dial level
Lay the dial horizontally. Turn it until the ordinary twelve-hour hand points toward the sun's direction. Leave the minute hand out of the calculation.
Find the midpoint
Find the midpoint between the hour hand and the twelve mark. In the morning use the arc before twelve; in the afternoon use the arc after twelve. This indicates approximate south.
Label the estimate
Mark that direction on your paper with an approximate label. The opposite direction is approximate north. Keep using proper navigation tools for any route decision.
Common mistakes
- Using the minute hand or a twenty-four-hour hand for these instructions.
- Forgetting to remove the daylight saving hour.
- Calling the result exact, or using the Northern Hemisphere rule everywhere.
Practice together
Dad sets a drawn clock for a pretend morning while the kid marks the hour hand and twelve. Switch to an afternoon example and choose the other arc. Finish by finding your home on a real map rather than following the estimate.
Sources
- Citizen, watch directions. Supports the ordinary hour-hand method and its latitude and season limitations. Checked Oct 26, 2026.
- Seiko, compass instructions. Supports standard-time adjustment, the Northern Hemisphere method and tropical limitations. Checked Oct 26, 2026.
- NPS, Ten Essentials. Recommends proper navigation equipment and knowing how to use it. Checked Oct 26, 2026.
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Dad Field Manual · /watch-compass/
Use a watch to estimate south
- Northern Hemisphere, outside tropics; approximate only.
- Use local standard time, not daylight saving time.
- Dial level, hour hand toward the sun's direction.
- Midway to twelve estimates south. Use proper navigation tools.
Before you start
- Use this Northern Hemisphere method outside tropical areas. Near the tropics, it can give misleading results at some times of year.
- Do not stare at the sun. Estimate its direction from shadows. Do not use this rough method when accurate navigation matters.
Full steps and sources: dadfieldmanual.com/watch-compass/