Instrument Flight Rules (IFR) Practice Exam

To determine the appropriate approach category for a circling approach, the stall speed in the landing configuration (Vso) is a crucial factor. The categories are defined based on the aircraft's stall speed, with each category encompassing a specific range of stall speeds.

In this case, an aircraft with a Vso of 72 knots falls within the range defined for Category B. This category is typically for aircraft that have a stall speed of 61 knots or more, but less than 76 knots. Category B accommodates aircraft that are a bit faster than the lower category but not quite as fast as those in Category C, which begins at a stall speed of 76 knots.

When an aircraft is classified in the correct approach category, it helps ensure safe operations during approaches and landing maneuvers, particularly in conditions that require circling approaches, where terrain and obstacles must be navigated carefully. Understanding the stall speed and how it fits into the categories is essential for effective flight planning and safety management. Proper classification ensures that the appropriate minimums and procedures are followed, contributing to overall flight safety.