How can current impact a diver's safety?

The impact of current on a diver's safety is significant, particularly in terms of increasing fatigue and air consumption. When a diver is swimming against a current, more physical effort is required to maintain position or make forward progress. This exertion can lead to quicker exhaustion, as the diver's body works harder against the water's flow.

Additionally, with increased physical activity, the diver's air consumption rises because the body demands more oxygen to support the heightened level of exertion. This means that a diver may deplete their air supply more rapidly than they would in calmer conditions. Monitoring air supply becomes critical, as divers must account for the increased consumption caused by current, potentially impacting their ability to return to the surface safely.

In contrast to the other options, which either do not relate directly to the hazards posed by current or suggest benefits that are not applicable in this scenario, understanding the connection between current, fatigue, and air consumption is essential for maintaining diving safety.