Communication, signalling and teamwork
Clear communication
Crane work is a team task. The operator, dogger/rigger and supervisor must share a common understanding of the lift. Use standard hand signals, whistle, radio or other agreed methods. Only one person should direct the crane at a time - usually the dogger - and the operator must know who that is. Anyone may give an emergency stop signal, and the operator must obey it.
Radio communication needs clear protocols: identify yourself, confirm instructions, use plain language, and repeat back critical instructions. Hand signals must be visible and unambiguous; if the operator cannot see the signaler, stop. Establish the signaler's position before the lift, and ensure they stay in sight or maintain radio contact. Brief the team: load, path, hazards, exclusion zone and emergency procedures.
Traps in exam questions
- Multiple people giving signals, or an unqualified person directing the lift.
- Assuming a nod or shout is a signal; signals must be agreed and clear.
- Ignoring an emergency stop from anyone.
- Losing sight of the signaler and continuing.
- Radio failure without a fallback plan.
Worked example
Rule of thumb: if you lose sight of your signaler or lose radio contact, stop the crane and lower the load safely. Do not guess the next move.
Exam tip
If a question asks who can stop the lift, the answer is anyone.