What is the primary reason for using a dive computer?

The primary purpose of a dive computer is to monitor depth and the time spent underwater, which is essential for managing no-decompression limits. This functionality is critical for divers as it helps them ensure that they do not exceed safe limits for time and depth, thus reducing the risk of decompression sickness, commonly known as "the bends."

Dive computers use real-time data to calculate the dive profile and continuously track nitrogen absorption as divers descend and ascend. This allows for better planning of the dive and safer ascent profiles. Additionally, a dive computer can provide instant feedback about remaining no-decompression time, which enables divers to adjust their dive plans dynamically based on their current depth and time underwater.

Monitoring depth and dive time is pivotal for all divers, whether they are recreational or technical, as it enhances safety and allows for more complex dive planning.