What visibility is required for a pilot to be assigned a visual approach?

The required visibility for a pilot to be assigned a visual approach is indeed 3 miles. When pilots are instructed to conduct a visual approach, it signifies that weather conditions are such that the approach can be executed primarily based on visual references rather than relying heavily on instruments. The criteria for a visual approach stipulate that pilots must have sufficient visibility to see and avoid other aircraft and obstacles, and 3 miles is established as the minimum visibility threshold to ensure safe maneuvering in the vicinity of the airport.

In addition to an appropriate visibility minimum, pilots must also be able to see the runway environment or the approach lights associated with the runway they will land on. This ensures that even if cloud layers are present, the pilot can visually navigate to the runway for a safe landing.