What is the correct hand signal to indicate "move forward"?

The hand signal for indicating "move forward" involves both arms raised. This gesture is typically recognized in the field as a clear and unambiguous signal for the operator or crew to proceed in the forward direction. When both arms are raised, it effectively catches attention and conveys that it's safe to advance, ensuring that everyone on site is aware of the command.

In high-pressure situations, clear communication is crucial, and traditional hand signals like raising both arms help to maintain safety and coordination among the crew members. Using this signal minimizes the risk of misunderstanding, which is vital when working with heavy equipment or near potential hazards.

In contrast, the other options do not correctly convey the "move forward" command. For example, an arm extended with palm up might indicate a different action, such as waiting for instructions. Similarly, extending an arm with the palm down could suggest stopping or holding position, while both hands waving generally convey a different message related to greeting or signaling attention rather than movement forward.