What breathing technique is recommended for efficient gas consumption during a cavern dive?

The recommended breathing technique for efficient gas consumption during a cavern dive is slow, deep, and controlled breaths. This method allows divers to increase their lung capacity and improve oxygen absorption while minimizing carbon dioxide production. By taking slower, deeper breaths, divers can maintain a more stable respiratory rate, which leads to a more efficient utilization of the gas supply.

Additionally, this technique helps to prevent hyperventilation, which can lead to a decrease in carbon dioxide levels in the blood, potentially causing respiratory alkalosis or other complications. Controlled breathing also helps divers remain calm and focused in an underwater environment, contributing to overall safety and situational awareness.

In contrast, fast, shallow breaths can lead to poor gas exchange and increased carbon dioxide retention, while only inhaling through the nose restricts the volume of air taken in. Holding the breath is not advisable because it can increase the risk of lung expansion injuries, especially during ascent. Thus, the practice of deep and controlled breaths supports both physiological efficiency and safety during a cavern dive.