Which operational condition includes CAT I and II?

The correct answer highlights that CAT I (Category I) and CAT II (Category II) conditions pertain specifically to the criteria established for approaches and landings during the instrument phase of flight. These categories are defined by specific visibility and decision height requirements that must be met for safe landing operations.

CAT I approaches allow for landings with a minimum visibility of 550 meters and may require a decision height of 200 feet or lower. CAT II approaches provide for lower minimums, permitting landing with visibility as low as 300 meters and decision heights as low as 100 feet, provided the aircraft is equipped with the proper instrumentation and the crew is trained for such operations.

Understanding CAT I and II as part of the approach and landing criteria is essential for flight operations, particularly under low visibility conditions. Other operational phases such as in-flight operations, ground operations, and climb and descent phases do not encompass the specific requirements and criteria associated with these approach categories.