Jonsered 1250RZ Operator's Manual page 21

Safety precautions and warnings
Lift
Raised arm and index finger raised. Circular motion with
the hand.
Lower
Arm pointing downwards and index finger down. Circular
motion with the hand.
Stop all crane movements / Hold the load in position
Raise the open hand, with the palm clearly visible, and arm
at shoulder height.
Keep the hand still.
Emergency stop for all movements by the crane
Raise the hands and the arms to an oblique angle.
Jonsered 1250RZ -1500RZ safety+R CE 21