Scan

Definition of “Scan” in Instrument Flight

In instrument flight, a pilot’s first fundamental skill is known as “scan,” which refers to the continuous and logical observation of instruments for both attitude and performance information. A pilot’s scan is critical for maintaining proper aircraft control and safety during instrument meteorological conditions.

During a scan, a pilot will visually and mentally process data from various instruments, including the attitude indicator, airspeed indicator, altimeter, vertical speed indicator, and heading indicator. By cross-checking these instruments and their readings, the pilot can monitor the aircraft’s pitch, roll, yaw, altitude, airspeed, and rate of climb or descent.

A proper scan involves a repetitive and systematic process that allows the pilot to quickly detect any changes in aircraft performance or attitude, and then take corrective action. A good scan pattern will allow the pilot to maintain a complete picture of the aircraft’s state, while also prioritizing critical instruments and information.

Overall, a pilot’s scan is a critical component of successful instrument flight, allowing them to maintain situational awareness, safely navigate through different weather patterns, and make informed decisions in real-time.