What is the purpose of "instrument cross-checking"?

The purpose of "instrument cross-checking" is centered around confirming the reliability of instrument readings. In instrument flying, pilots rely on various instruments to provide critical information regarding the aircraft's altitude, heading, speed, and other key flight parameters. Because atmospheric conditions, mechanical issues, or human errors can affect these readings, cross-checking helps ensure accuracy and consistency among multiple instruments. This practice enables pilots to maintain situational awareness and make informed decisions, ultimately enhancing flight safety.

Other choices are less relevant to this concept. For example, enhancing the pilot's flying experience or managing fuel consumption are not primary goals of cross-checking; rather, they may be considered outcomes or separate aspects of piloting. Testing the aircraft's maximum speed is a specific operational procedure unrelated to the ongoing necessity of validating instrument readings during flight.