Signals, Communications and Blind Lifts
What the exam tests
Signals, Communications and Blind Lifts tests agreed signalling, radio discipline and stopping rules when the operator cannot see the load or landing area. The exam favours a single clear signal path.
Core rules
- Agree the signalling method before the lift: standard hand signals, radio channel or both. Confirm who is the authorised signaller.
- Use one signaller for the crane or machine. Multiple signallers create conflicting commands unless the plan names a override arrangement.
- Anyone may give a stop signal. The operator must obey a stop signal from any person.
- For a blind lift, use a spotter at the landing point, a camera if fitted and a pre-agreed sequence. If communication is lost, stop and hold the load safely.
- Keep radio batteries charged and use clear, short messages. Do not use a mobile phone as the primary signal during a lift.
Worked example
A crane lifts a package over a wall. The operator cannot see the landing area, so a spotter is placed there with a radio. The spotter confirms the load is clear, gives slow lowering commands and calls stop when the load is 300 mm above the target. If the radio fails, the operator stops and lowers only under the emergency plan, not by guessing.
Traps
Do not accept signals from an unknown person. Do not let two people signal at once. Do not continue a blind lift after losing communication. Do not assume a camera removes the need for a spotter.
Key points
- Agree one signalling method before the lift.
- Use one authorised signaller.
- Anyone can stop the lift.
- Lost communication means stop.