What is the principle use of a dive computer?

The primary purpose of a dive computer is to track depth and time during a dive. This device is essential as it continuously monitors and records these parameters to help divers manage their ascent rates, avoid decompression sickness, and ensure safe diving practices. By providing real-time data on how deep the diver is and how long they have been underwater, a dive computer plays a crucial role in making informed decisions throughout the dive.

While dive planning is an important process that divers undertake prior to entering the water, the actual function of the dive computer during the dive is to ensure that the diver remains aware of their current depth and dive duration. This real-time information allows divers to make necessary adjustments and adhere to safety protocols while underwater.