Signalperson Duties and Hand Signals
The signalperson is the operator's eyes and is responsible for clear, correct, and timely communication. Know the standard hand signals for hoist, lower, boom up and down, boom extend and retract, swing, stop, emergency stop, dog everything, and travel-and understand that signals must be given from a position with a clear view of the load, the operator, and the swing path. Voice or radio communication supplements but does not replace the agreed signal method.
Key concepts: one designated signalperson at a time unless the operator and signalperson agree otherwise; the operator must obey a stop signal from anyone; emergency stop is distinct from a normal stop; and signals must be repeated or acknowledged when the operator's view is obstructed. Understand that the signalperson must know the lift plan and the intended path, not just individual signals.
Traps: assuming any worker may direct a lift; confusing boom extend/retract with hoist/lower; treating a hand signal as advisory when it is a stop; and signaling from a position where the load blocks the operator's view. Questions also test that the operator stops when communication is lost or ambiguous.
Rule of thumb: when in doubt, stop. A stop signal from any person is obeyed immediately, and no lift resumes until communication is clearly re-established.
Worked example: the signalperson's radio fails mid-lift. The correct action is to stop the load, hold it, and re-establish an agreed signaling method before continuing-never to continue on assumption.