A dive computer is a device used by scuba divers to monitor their underwater activities. It tracks important information such as depth, time, and water temperature, helping divers manage their dive profiles safely. By calculating no-decompression limits, it helps prevent decompression sickness, also known as "the bends." Most dive computers are wrist-mounted and feature digital displays for easy reading. They can also log dive data for later review and may include features like alarms for safety alerts. Some models even connect to computers or smartphones for data analysis, enhancing the diving experience for enthusiasts and professionals alike.