What is the function of a dive computer?

A dive computer is an essential piece of equipment designed specifically to assist divers by tracking critical parameters during a dive. Its primary functions include monitoring current depth, measuring dive time, and calculating no-decompression limits to ensure diver safety. By continuously tracking these variables, a dive computer helps prevent decompression sickness, allowing divers to ascend in a safe manner based on real-time data rather than predetermined tables.

The ability to automatically adjust to changing conditions underwater, such as varying dive profiles or unexpected stops, makes the dive computer particularly valuable compared to manual planning methods. It provides divers with immediate feedback, helping them make informed decisions throughout the dive.

Other options, while related to diving, do not encapsulate the primary function of a dive computer as accurately. For example, establishing dive plans typically involves pre-dive planning rather than real-time monitoring, and monitoring physical fitness or communicating with other divers are functions that are not inherent to the design and purpose of a dive computer.