What Terrain flight mode is 25 feet to 80 feet AHO?

• A. Nap of the Earth (NOE)
• B. Contour
• C. Mesh path
• D. Low-level profile

Answer: (B)

The concept being tested is how terrain-following flight modes manage altitude relative to the ground. Contour mode is designed to ride the land’s shape by maintaining a constant distance above the terrain as you fly, so you follow hills and valleys rather than staying at one fixed height above sea level. This keeps you within a typical clearance range of roughly 25 to 80 feet above the terrain, which is ideal for capturing terrain features while maintaining safe margins.

Hugging the ground more tightly is nap of the Earth, which sits much closer to the surface and isn’t described by a 25–80 foot band. Mesh path is a surveying pattern for systematic area coverage and isn’t about following terrain contours. Low-level profile implies a low, steady altitude but not specifically following terrain contours. So the mode that matches the 25 to 80 feet above terrain description is contour.