What is the primary function of a dive computer?

The primary function of a dive computer is to monitor dive time, depth, and no-decompression limits. This device plays a crucial role in ensuring the safety of divers by providing real-time data about their underwater environment. Dive computers continuously track how long a diver has been underwater and at what depths, which is vital for preventing decompression sickness. They calculate and display no-decompression limits, which indicate the maximum time a diver can spend at a given depth without needing to make mandatory safety stops upon ascent. By having this information readily available, divers can make informed decisions about their diving profiles, thereby enhancing safety and enjoyment while underwater. This systematic monitoring is essential for recreational divers, especially those who may dive without a buddy or in challenging conditions.