How can divers effectively manage their air supply during a dive?

Monitoring tank pressure and planning dives is essential for effectively managing air supply during a dive. Divers must be aware of their air consumption rate, which can vary based on activity level, depth, and individual metabolic factors. By regularly checking tank pressure, divers can make informed decisions about how much time they have left underwater and when it’s necessary to begin their ascent.

Additionally, pre-dive planning is a critical component that involves calculating the expected air consumption based on planned depth and duration, ensuring that divers remain within their limits. This preparation reduces the risk of unexpected air shortages and helps in establishing a safe ascent profile.

Using dive computers, while beneficial for tracking various metrics, should complement, not replace, the fundamental practice of monitoring air supply. Divers also should consider their experience level and environmental conditions rather than simply opting to avoid deep dives, as safe practices can mitigate risks associated with deeper diving. Therefore, option C encapsulates the comprehensive approach needed for effective air supply management.