Why is it advisable for night divers to use a dive computer?

Using a dive computer is advisable for night divers primarily because it allows them to manage depth, time, and nitrogen absorption accurately. Night diving presents unique challenges, such as decreased visibility and increased risk of disorientation, making it essential to have precise monitoring of dive parameters. A dive computer continuously tracks your current depth and time spent at that depth, helping to ensure that divers stay within safe limits to avoid issues like decompression sickness. The computer also calculates the residual nitrogen in the diver’s body, providing real-time data that is crucial for safe dive planning and execution. This level of precision helps divers make informed decisions throughout the dive, which is even more critical when visibility is limited.

Other options such as measuring temperature changes, guiding divers to the surface, or tracking physical fitness may not specifically address the core safety and monitoring needs that are paramount during night dives.