When should a diver rely on their dive computer’s limits?

A diver should rely on their dive computer’s limits during each stage of the dive because the computer continuously monitors their depth and time, providing real-time data essential for safe diving. This inclusion of factors such as no-decompression limits, ascent rates, and residual nitrogen in the body adjusts dynamically as the dive progresses based on the diver's actual dive profile.

Using the computer's limits at every stage helps ensure that the diver remains within safe parameters to avoid the risks associated with decompression sickness. Since environmental factors and personal circumstances can change throughout the dive, continuously referring to the computer helps maintain awareness of these limits, allowing for safe decision-making regarding depth and time.

In contrast, relying on a computer only at the surface or during surface swims would not benefit the diver during critical phases of the dive. Dive computers are designed to assist divers throughout the entire underwater experience, helping maintain safety as conditions change.