Finding true north without a compass — is it reliable?

Using the Sun

To find true north using the sun, locate the sun’s shadow at midday. Draw a straight line on the ground and mark the end of the shadow. Mark the end of the shadow at the same time the next day. Draw a line through both marks. In the northern hemisphere, the midpoint of this line will be south. Use the sun’s shadow technique on a clear day for best results. For accurate results, use the sun’s shadow at the equinoxes (March 20-23 and September 22-23), when the sun’s shadow is perpendicular to the horizon.

Using the Stars

To find true north using the stars, locate the Big Dipper constellation in the northern hemisphere. Draw an imaginary line through the two stars at the end of the “bowl” away from the “handle.” Continue this line through the North Star (Polaris), which is located almost directly north. The North Star is about 0.7° off true north, so it’s essential to note the difference and make the necessary adjustments. The North Star is visible year-round in the northern hemisphere, making it a reliable navigation tool.

Additional Methods

Other methods to find true north include using moss growth, observing the direction of water flow, and identifying the direction of shadow at sunrise and sunset. However, these methods are often imprecise and should be used as a last resort. Always prioritize using the sun or stars for accurate navigation.