When should divers monitor their gas supply most closely?

Monitoring gas supply throughout the entire dive is crucial for ensuring the safety and success of a dive. Divers rely on their breathing gas to not only reach their desired depths but also to safely complete ascents and any potential safety stops.

By keeping a continuous check on gas levels, divers can make informed decisions throughout the dive, including whether they need to adjust their depth, modify their planned duration, or prepare for an early ascent if necessary. This ongoing awareness helps prevent running out of gas, which can result in life-threatening situations, especially in deeper and longer dives where the risks are compounded.

Commencing the dive with a full understanding of gas supply and consistently monitoring it as conditions change is essential for effective dive planning and execution. This practice fosters a habit of safety that is vital for divers, particularly those exploring challenging environments or deep-water sites, where unexpected issues may arise.