What is the function of a dive computer?

The primary function of a dive computer is to measure depth and time during a dive. This device continuously tracks these critical factors and provides real-time information to divers, helping them monitor their dive profile. By keeping track of depth, a dive computer can calculate and display how long a diver has been at that depth, which is essential for managing no-decompression limits and ensuring safe ascent rates.

Proper depth and time monitoring helps prevent decompression sickness by allowing divers to ascend at appropriate rates and make safety stops if necessary. Since dive computers calculate nitrogen absorption and elimination based on depth and time, they play a crucial role in ensuring that divers remain within safe operational limits throughout their dive.

While the other options relate to important aspects of diving, they do not directly pertain to the main function of a dive computer. Airway clearance, buoyancy control, and emergency oxygen are essential safety considerations for divers but are not tasks performed by a dive computer itself.