Voice, Radio & Communication Protocols
Voice signal procedures, radio communication requirements, backup plans, signalperson transfer, and unclear signal protocols.
- Describe voice and radio signal requirements for crane operations
- Explain the signalperson transfer procedure and single designee rule
- Identify proper protocol for unclear signals and backup communication plans
Leçon 1
Voice & Radio Signal Requirements
When Voice or Radio Signals Are Used
Voice and radio signals are used when:
- Distance makes hand signals difficult to see
- Environmental conditions (fog, rain, darkness) reduce visibility
- The operation requires continuous, detailed communication
- The lift plan specifies radio communication
Hand Signals
Visual communication
Standard ASME B30.5-2025 signals
Requires line of sight
Works in noisy environments
Voice/Radio Signals
Verbal communication
Standard terminology required
Works without line of sight
Requires clear radio channel
Radio Communication Requirements
When using radio communication for crane operations:
- Agree on a dedicated channel before operations begin
- Use standard terminology - not casual language
- Repeat commands back for confirmation
- Maintain a clear, uninterrupted channel
- Have a backup communication method in case of radio failure
Voice Signal Protocol
Voice signals follow the same command structure as hand signals but spoken:
- "Hoist" or "Hoist main" - raise the load
- "Lower" or "Lower main" - lower the load
- "Boom up" / "Boom down" - raise or lower the boom
- "Swing left" / "Swing right" - rotate the superstructure
- "Stop" - stop all current movement
- "Emergency stop" - stop immediately, danger present
Exam Tip
When asked about voice/radio signal requirements: agree on channel, repeat commands, and use standard terminology. Casual or unclear commands are not acceptable.
Voice and radio signals require a dedicated channel, standard terminology, and command confirmation (repeat-back). Always have a backup communication plan in case of radio failure.