Who must be present on site during a commercial diving operation?

• A. The Client Representative
• B. A Qualified Dive Supervisor
• C. A Certified Stand-By Diver
• D. The Site Safety Officer With No Dive Supervisor On Site

Answer: (B)

The main idea is that on-site supervision by a qualified dive supervisor is essential for safety during a commercial diving operation. This person is the on-site authority who plans, monitors, and can halt work as needed to maintain safe conditions. They oversee the dive plan, entry and exit procedures, gas and decompression schedules, communications, and emergency readiness, and they coordinate all aspects of the operation to ensure procedures are followed and hazards are managed.

Having a qualified dive supervisor present means there’s a competent, accountable individual continuously watching the dive activities, making decisions, and authorizing actions. Without this role on site, safety oversight isn’t guaranteed, and the team would lack a responsible person to enforce the dive plan and respond to problems.

A client representative may be involved in contractual or administrative roles but isn’t required to supervise the dive. A certified stand-by diver provides immediate support if needed but cannot substitute for the supervisory function. A site safety officer contributes to safety oversight, but the operation still requires a qualified dive supervisor on site to lead the diving activities and make imminent safety decisions.