Length: 15 Min.
...The most common and universal means of communication between deck personnel and the crane operator is hand signals. On some rigs and platforms, the crane operator and assisting deckhands can communicate verbally by using two-way wireless systems. However, electronic systems are not always available, they can be cumbersome, they can be drowned out by noisy machinery, and they are subject to interference or breakdown. They do not excuse the operator or assisting personnel from knowing hand signals.
All, repeat, all personnel involved in any lift operation must know these hand signals defined as standard by API, the American Petroleum Institute...
...Hoist. With your forearm vertical and your forefinger pointing up, move your hand in a small horizontal circle..