A diver has 80 cubic ft jugs. What must the Dive Supervisor calculate?

The correct choice is focused on the diver's remaining air supply for the dive. In diving operations, understanding the remaining air supply is crucial for ensuring the diver's safety and planning the dive effectively.

Calculating the remaining air supply allows the Dive Supervisor to monitor how much air is left in the diver's tanks and determine whether the diver has sufficient air to complete the dive and safely ascend. This is especially important because running out of air underwater can lead to dangerous situations, including decompression sickness.

The supervisor needs to consider factors such as the diver's depth, the duration of the dive, and the diver’s air consumption rate to accurately assess the remaining air supply. Knowing this information helps the Dive Supervisor make informed decisions about the dive profile and ensures that divers can finish their tasks while maintaining a safe margin for ascent, reserve air, and emergencies.