What is the minimum manning requirement for conducting a recompression treatment?

To conduct a recompression treatment safely and effectively, it is crucial to have at least one qualified tender present inside the chamber. This ensures that there is an individual who is trained to monitor the diver's condition, manage the recompression process, and respond to any emergency situations that may arise during treatment. The qualified tender's role includes both the technical aspects of operating the chamber and providing immediate support to the diver in distress.

Having qualified personnel ensures adherence to safety protocols and provides the necessary care as the diver undergoes recompression therapy. The other choices do not meet the minimum requirements set by diving safety protocols, indicating that having a qualified tender inside the chamber is a fundamental necessity for ensuring a safe treatment environment for the diver.