What is the significance of the Decision Altitude (DA) during an approach?

The Decision Altitude (DA) is a critical parameter during an approach as it represents the altitude at which a pilot must make a crucial decision about the flight path. Specifically, at this altitude, the pilot must determine whether to continue the approach to landing or to execute a go-around if the necessary visual references for landing are not established. This decision is essential for maintaining safety, as it provides a clear boundary for the pilot related to visibility and approach criteria.

Understanding the significance of the DA helps pilots ensure they are prepared for landing under safe conditions. If visual cues are available, the pilot can safely proceed to land. Conversely, if those cues are not available, the pilot must have the discipline to initiate a go-around to avoid potential hazards. This aspect of decision-making during critical phases of flight is central to flight safety and efficiency.