What are the consequences of diving without a dive computer?

Diving without a dive computer necessitates a greater reliance on dive tables for planning and executing dives. Dive tables are tools used to calculate no-decompression limits and to help divers safely manage their ascent times and decompression stops based on the depth and duration of their dives. Without a dive computer to provide real-time data and calculations, divers must follow the prescribed limits set by these tables more strictly to avoid the risks of decompression sickness and other diving-related injuries.

Using dive tables requires careful planning before the dive and constant vigilance during the dive to ensure adherence to the limits. This reliance can often slow the diving process and require divers to be very meticulous about their dive profiles, including how long they can stay at various depths and when they should ascend.

While diving without a computer may seem to offer some aspects of freedom and flexibility, it actually imposes more constraints in terms of dive planning and execution. A dive computer can simplify the process by automatically adjusting for factors such as residual nitrogen from previous dives, making it easier for divers to stay within safe limits.