What is the minimum emergency gas supply duration recommended for divers?

The minimum emergency gas supply duration recommended for divers is typically set at two minutes. This figure is based on safety protocols that consider the potential need for a diver to manage an emergency situation, such as having to conduct an emergency ascent or reach a safe area while maintaining a reserve of gas.

Two minutes is deemed sufficient time for a diver to respond effectively to an emergency. This duration accounts for the physiological needs of the diver, allowing them to maintain controlled breathing and avoid panic while executing necessary safety measures. Additionally, having an emergency gas supply lasting for this duration helps ensure that divers can adhere to safe ascent rates and potentially clear off any complications that may arise during the emergency phase.

Other durations such as one minute, thirty seconds, or even five minutes do not align with established safety practices in diving procedures, as they do not provide an adequate margin for the complexities that can occur in underwater emergencies. The standard of two minutes reflects best practices in diving safety training and emergency planning.