What is the primary function of a dive computer?

The primary function of a dive computer is to track depth, time, and ascent rate. It serves as a crucial tool for divers by continuously monitoring their underwater environment and providing real-time data. By displaying these key metrics, the dive computer helps divers avoid dangerous situations such as exceeding no-decompression limits and managing ascent rates to prevent decompression sickness.

This tracking capability allows divers to make informed decisions during their dive and enhances safety by providing immediate feedback. While maintaining a logbook is essential for documenting dive experiences, and navigational aids can assist in finding locations underwater, these functionalities are secondary compared to the fundamental role of monitoring and ensuring diver safety by keeping track of depth and time.