If a physically or psychologically impaired diver insists on diving, what action should the leader take?

The appropriate action when a physically or psychologically impaired diver insists on diving is to counsel them on why diving is not advisable and request that they discontinue diving. This choice emphasizes the responsibility of the dive leader to prioritize safety. Diving requires a clear mind and physical capability to respond to potential hazards underwater. If a diver is impaired, they may not be able to make sound decisions or react appropriately in emergencies, which puts themselves and others at risk.

By having a conversation about the risks and implications of diving in their current state, the dive leader maintains a standard of safety and ensures that the diver is fully aware of the potential dangers involved. This approach not only protects the impaired diver but also safeguards the entire diving group. The focus on counseling supports a safe diving environment, rather than simply allowing the individual to dive under supervision, which may not mitigate the risks involved adequately.