To make a compass, you must first magnetize a needle by rubbing its endpoint with a magnet about fifty to a hundred times. Next, flip the magnet over and use the opposite side to magnetize the other end of the needle. Finally, push the needle into a piece of cork or cardboard, place it on water, and observe as your makeshift compass aligns itself with the Earth’s magnetic field.
If you’re in the northern hemisphere, hold your wristwatch horizontally and point the hour hand directly towards the sun. The middle point between the hour hand and the twelve o’clock marker is true south. If you’re in the southern hemisphere, hold the twelve o’clock marker towards the sun instead. True north should be at the midpoint between the twelve o’clock marker and the hour hand.