How should communications be established and maintained during the dive?

How should communications be established and maintained during the dive?

• A. Use tested surface-supplied communication systems (voice or line signals), confirm procedures, and maintain continuous contact with divers and standby.
• B. Use only visual signals from the boat and ignore line signals.
• C. Rely on postdive debrief for all communication.
• D. Use modern cell phones underwater to talk to divers.

Answer: (A)