When may you use non-standard hand signals?

• A. Only when authorized, properly trained, and in coordination with the signaling system and crew.
• B. Never use non-standard signals.
• C. Whenever you feel it helps speed operations.
• D. Only when the lead unit is stopped.

Answer: (A)

Non-standard hand signals may be used only when authorized, properly trained, and in coordination with the signaling system and the crew. Standard signals are the shared language that keeps movements safe and predictable; signals outside that standard must be part of a formal authorization process so everyone understands their meaning and how they fit with the control system. Training ensures the signal is unambiguous, that the person giving it can be seen and understood, and that it aligns with the current indications and authority for the movement. It’s not about personal judgment or speed; using non-standard signals without authorization risks miscommunication and accidents, whereas authorized use only supplements the standard signaling in a controlled, coordinated way. The other options fail because they encourage improvisation, ignore training or coordination requirements, or apply only in restricted situations.