At the first stage you will find a waterproof box containing the Ultrasonic Range Finder Demonstrator.
1 Open the lid being careful not to knock dirt of leaves into the container.
2. Push the red start button. One should hear one beep indicating that the system is operational.
3. Hold a hand about 12 inches, palm down facing the Ultrasonic Range Finder, and again push the start button. The demonstrator will beep out the last three digits of the Latitude and Longitude of the final stage. NOTE Ten beeps = Zero.
4. We suggest that you try it again with the hand about 6 inches and again 18 inches above the range finder.
5. Close and latch the container and carefully hide it the way you found .
It might be a good idea to print this page and bring it with you.