What dive computer means in practice
A dive computer records depth and time and uses a mathematical decompression model. Its display combines measurements with calculated information; those are different kinds of evidence. Features and modes vary by model.
An example to think through
Two friends compare screens during a discussion on land. Before interpreting different numbers, they would need to understand the devices, settings and recorded dive histories. A photograph of a screen without that context can be misleading.
A common misunderstanding
A calculated limit is not a direct measurement of a diver’s tissues or a guarantee of safety.
Underlying concept: PADI — Dive Computers. The example is an original YouDive study prompt, not a reported dive.