What is the primary factor determining whether to proceed with an approach under low visibility conditions?

The primary factor determining whether to proceed with an approach under low visibility conditions is minimum visibility requirements. These requirements are established to ensure that the pilot has adequate visual references to safely navigate the aircraft during the approach and landing phases. Adhering to these established visibility standards is crucial, as they are based on safety regulations and operational guidelines that help pilots assess whether they can execute the approach without risking loss of control or safely encountering obstacles.

Minimum visibility requirements take into account various elements, such as the type of instrument approach being conducted and the capabilities of both the aircraft and the equipment in use. They serve as a benchmark to evaluate whether the conditions are suitable for a safe landing. When visibility falls below these minimums, the risks of an approach increase significantly, making it inappropriate for a pilot to proceed.