What is the purpose of a dive computer?

A dive computer primarily serves to monitor and display critical information related to a diver's underwater activities, specifically tracking depth and time during a dive. This function is essential for ensuring that divers remain within safe limits as defined by no-decompression tables and to minimize the risk of decompression sickness. By continuously calculating the diver's current depth and elapsed time, the dive computer can provide real-time data that helps divers make informed decisions regarding ascent rates and dive profiles.

This monitoring is crucial, as staying within the safe range of time and depth can significantly affect the safety and success of the dive. While other tools and equipment are important for various aspects of diving, such as tracking air supply or facilitating communication, the primary role of a dive computer is focused on depth and time management during dive activities.