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Build a stick-and-shadow sun compass

A stick-and-shadow sun compass gives you approximate cardinal directions when you have clear sunshine but no working compass. You mark the tip of a stationary stick’s shadow twice, 15–20 minutes apart, and use its movement to estimate an east-west line. A perpendicular line gives you approximate north and south in either hemisphere. Treat this as a rough orientation aid, not a precise compass: the short-interval method does not produce an exact east-west line everywhere or at every time of day.

Navigation 20 min practice Beginner Choose flat, level ground with an unobstructed view of the sun and a shadow tip you can clearly identify throughout the waiting period. Slopes, shifting foliage shadows, nearly overhead sun, and very low sun can make the method difficult or misleading.

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Topic summary

Key takeaways

Your stick remains upright and unmoved throughout the observation.
You have two distinct shadow-tip marks with their time order clearly identified.
Your north-south line crosses the shadow-mark line at a right angle, with west on your left when you face estimated north.
Your labeled directions broadly agree with an independent direction reference.
Avoid: Using sloping or uneven ground distorts the result; move to a level patch before starting.
Avoid: Letting the stick lean, wobble, or move changes the shadow independently of the sun; set it upright and restart if it shifts.

Intended uses

Navigation skill (Beginner, ~20 min practice)
Requires: Watch or timer to measure the waiting interval, Small stick for drawing lines on the ground

Climate suitability

Choose flat, level ground with an unobstructed view of the sun and a shadow tip you can clearly identify throughout the waiting period. Slopes, shifting foliage shadows, nearly overhead sun, and very low sun can make the method difficult or misleading.

BattlBox — Stick and Shadow Survival Compass Watch on YouTube

Safety: Check your estimate against a map, compass, or known terrain before committing to a route, especially near cliffs, water crossings, or other hazards. Direction alone does not tell you where you are or whether a route is safe.

Required tools

Watch or timer to measure the waiting interval
Small stick for drawing lines on the ground

Required materials

One straight stick long enough to cast a clear shadow
Two small stones for marking shadow tips
Additional stones or twigs for labeling directions

Step-by-step

Push a straight stick into flat ground in full sun.
Why: Set it upright and firmly enough that it cannot shift; level ground and a stationary stick give you a consistent surface for tracking the shadow.
Mark the tip of the shadow with a stone. Wait 15–20 minutes and mark the new tip.
Why: Place each stone precisely at the tip and remember which came first; the wait creates enough separation to make the shadow’s movement easier to read.
Draw a straight line through both marks — this is your east-west line, with the first mark to the west.
Why: Use this as an approximate west-to-east reference, not an exact bearing, because a short section of the shadow’s curved daily path can depart substantially from true east-west.
Stand with the west mark at your left toe and the east mark at your right toe; you are facing north.
Why: This left-right arrangement keeps you from reversing north and south; your estimated north direction is perpendicular to the line, straight ahead.
Mark north, south, east, and west on the ground so you can travel without re-checking.
Why: These marks preserve your reference at that spot; before leaving, sight along the needed direction to a distinct landmark, since the ground markings do not guide you once out of sight.

Tip: For a traveling compass, draw the cross at camp and sight along the north line to a distant landmark before you move.

Common mistakes

Using sloping or uneven ground distorts the result; move to a level patch before starting.
Letting the stick lean, wobble, or move changes the shadow independently of the sun; set it upright and restart if it shifts.
Marking different parts of a fuzzy shadow creates inconsistent readings; use the same identifiable tip each time.
Forgetting the order of the marks reverses your directions; label the first mark west immediately.
Treating the cross as an exact compass rose invites navigation errors; use it for rough orientation and verify it independently.

Troubleshooting

If cloud or moving foliage hides the shadow tip, then wait for steady sunshine and restart if you cannot identify the tip confidently.
If the two marks are too close to draw a clear line, then wait longer and mark another tip without moving the stick.
If the shadow is almost directly beneath the stick, then try a taller stable stick or wait until the sun is lower.
If your result conflicts with a reliable compass or known mapped direction, then check your setup and mark order rather than trusting the shadow estimate.

Field practice drill

In a safe, familiar clearing, set up your stick, mark the first tip, and return after 15–20 minutes to finish the cross. Sight along your estimated north line to a distant landmark before moving, then compare the result with an independently established north direction, accounting for magnetic declination if using a compass. Repeat at another time of day to see how the estimate changes.

Indicators of success

Your stick remains upright and unmoved throughout the observation.
You have two distinct shadow-tip marks with their time order clearly identified.
Your north-south line crosses the shadow-mark line at a right angle, with west on your left when you face estimated north.
Your labeled directions broadly agree with an independent direction reference.

Related outdoor skills

Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations before you rely on any of these skills in the field.