General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

What is the maximum glide slope angle permitted?

1. 2.00 degrees

2. 2.50 degrees

3. 3.00 degrees

4. 3.25 degrees

The correct answer is: 3.25 degrees

The maximum glide slope angle permitted is 3.25 degrees. This standard is established to ensure a safe and effective descent path during the approach phase of an aircraft landing. Glide slopes are a critical component of Instrument Landing Systems (ILS), and they guide pilots in maintaining the correct angle of descent towards the runway. A glide slope angle of 3.25 degrees ensures that aircraft can descend at a rate that is consistent with safety protocols while accommodating different aircraft performance characteristics and environmental conditions, such as terrain and weather. Adhering to this maximum angle is essential for preventing excessive descent rates that could lead to safety hazards, such as controlled flight into terrain or other navigational difficulties. While lower angles might exist for certain approaches or circumstances, such as in the case of specific airport configurations or conditions, the generally accepted maximum glide slope of 3.25 degrees is the standard used for most operations. This angle strikes a balance between operational efficiency and safety, allowing pilots to make safe landings across a variety of aircraft types and performance capabilities.