A dive computer is a device that helps scuba divers monitor their underwater activities. It tracks important information like depth, time, and remaining air supply, ensuring divers stay safe while exploring the ocean. By providing real-time data, it helps prevent issues like decompression sickness, which can occur if divers ascend too quickly. These devices come in various forms, from wrist-mounted gadgets to integrated systems in diving masks. Many modern dive computers also connect to smartphones, allowing divers to log their dives and share experiences with friends. Overall, a dive computer is an essential tool for anyone interested in underwater adventures.