What is the function of a dive compass?

The function of a dive compass is to aid divers in navigation underwater by providing directional orientation. Underwater environments can often be disorienting due to the absence of visible landmarks and varying visibility conditions. A dive compass allows divers to maintain their intended course, helping them return to a specific point such as the entry point or to navigate between different locations.

By understanding headings in degrees and using the compass in conjunction with other navigational techniques, divers can effectively plan and execute their dive routes. This is particularly important for safety, as it ensures that divers do not become lost or inadvertently drift away from their intended dive site.

Other options like measuring the depth of water, calculating temperature, or assisting with buoyancy control do not describe the primary purpose of a dive compass, which is focused solely on navigation and directional guidance.