What tool can help you navigate back to the entry point in limited visibility?

Using a compass for navigation during dives in limited visibility is essential because it provides directional guidance that is reliable and unaffected by the environment. In murky waters or when visibility is reduced, visual references are often lost, making it challenging to find your way back. A compass helps divers maintain their bearings and navigate accurately to their entry point, especially over longer distances, as it allows them to track their heading and make necessary adjustments.

Other tools have their uses in diving but do not offer the same level of navigational support in limited visibility conditions. For example, a flashlight illuminates the immediate surroundings, which is useful for seeing, but it does not provide directional information. A dive slate can be used to communicate ideas or plan dives, but it does not assist in navigation. A dive computer tracks depth and time but lacks navigational capabilities, making a compass the most effective tool for ensuring a safe return to the entry point when visibility is limited.