Surveyor signal

During surveying field work, the distant between chainman (worker who help surveyor) and surveyor would be very far. Therefore, a standard hand signal is formed in order for them to communicate.
Here's some example of the hand signal.

UPPER

LOWER

LITTLE UPPER

LITTLE LOWER

STOP

OK!

Other hand signal include front, back, buble (staff not in the bobble center), left, right, numbering...