What is NOT a recommended safety measure for deep wreck diving?

In the context of deep wreck diving, safety measures are paramount to ensure a successful and secure experience. While extra gas supply, training for depth, and monitoring dive time are essential components of safe diving practices, excessive air consumption is not a recommended safety measure.

Excessive air consumption indicates a diver is using up their air supply at an unsustainable rate, which can lead to a dangerous situation, especially in deeper dives where pressure increases and the risks associated with decompression sickness and running out of air are heightened. In contrast, maintaining efficient air consumption allows divers to extend their time underwater safely and to manage their air supply more effectively, ensuring they return to the surface with adequate gas reserves.

In summary, excessive air consumption is detrimental, whereas the other options contribute positively to the safety and effectiveness of deep wreck diving by ensuring divers have the equipment, training, and monitoring necessary to dive responsibly.