Which pairing correctly matches a terrain flight mode with its altitude band?

Which pairing correctly matches a terrain flight mode with its altitude band?

• A. Nap of the Earth (NOE): Surface to 25 Feet AHO; Contour: 25 Feet to 80 Feet AHO
• B. Nap of the Earth (NOE): 25-80 Feet AHO; Contour: Surface to 25 Feet AHO
• C. Nap of the Earth (NOE): 80-120 Feet AHO; Contour: 60-100 Feet AHO
• D. Nap of the Earth (NOE): Level; Contour: Hover

Answer: (A)

Understanding how terrain flight modes map to altitude bands. Nap of the Earth means flying extremely close to the ground, with altitude measured from the terrain itself, so the typical band is from the surface up to about 25 feet AHO. Contour mode keeps a steady clearance above terrain as you follow the terrain’s shape, usually from about 25 feet up to 80 feet AHO. The other pairings don’t line up with how these modes are used: NOE isn’t defined from 80–120 feet, and Contour isn’t defined from the surface or at hover-level in this context. Therefore, the pairings NOE: surface to 25 feet AHO and Contour: 25–80 feet AHO correctly reflect how these modes are applied.

Understanding how terrain flight modes map to altitude bands. Nap of the Earth means flying extremely close to the ground, with altitude measured from the terrain itself, so the typical band is from the surface up to about 25 feet AHO. Contour mode keeps a steady clearance above terrain as you follow the terrain’s shape, usually from about 25 feet up to 80 feet AHO. The other pairings don’t line up with how these modes are used: NOE isn’t defined from 80–120 feet, and Contour isn’t defined from the surface or at hover-level in this context. Therefore, the pairings NOE: surface to 25 feet AHO and Contour: 25–80 feet AHO correctly reflect how these modes are applied.