Before swinging, operators should use which method to alert nearby personnel?

• A. Sound the horn
• B. Wave a flag
• C. Shout instructions
• D. Turn on the crane lights

Answer: (A)

Before lifting or swinging a load, giving a clear warning to people nearby is essential for safety. The horn is the standard, immediate signal that a move is about to start, and it travels across the work area so ground personnel can hear it and clear the swing path in time.

Waving a flag can be missed due to distance, blind spots, or weather conditions. Shouting instructions may be drowned out by noise on a busy site and can cause confusion. Turning on crane lights helps visibility of the equipment but doesn’t reliably alert everyone in the area that a swing is about to occur.

So, using the horn provides a universal, quick, and recognizable warning that reliably informs nearby workers to stay clear before the load is moved.