What is an essential communication practice during a multi-crane operation?

In a multi-crane operation, confirming communication with all cranes is vital to ensure safety and coordination among the operators. This practice helps in synchronizing movements, coordinating lifts, and preventing potential accidents that could arise from miscommunication or a lack of awareness of each crane's position and planned actions. By maintaining open lines of communication with all cranes involved, operators can effectively share critical information, such as changes in load status, unexpected obstacles, or adjustments in lifting techniques. This collaborative approach enhances situational awareness and promotes a safer working environment.

The other options do not adequately support effective communication practices in a multi-crane setup, which is inherently complex and requires continuous coordination among all involved personnel. Limiting communication or only addressing one crane could lead to misunderstandings, posing safety risks during operations. Using external communication devices might be useful in some scenarios, but it is critical to establish comprehensive communication protocols amongst all cranes to manage the operation effectively.