What Terrain flight mode is surface to 25 feet AHO?

What Terrain flight mode is surface to 25 feet AHO?

• A. Nap of the Earth (NOE)
• B. Contour
• C. Hover
• D. Level Flight

Answer: (A)

Nap of the Earth is the terrain flight mode that keeps the aircraft extremely close to the ground, essentially following the surface and its contours. Staying within a small vertical distance above the terrain—often described as surface to about 25 feet above ground level—defines this mode. That close proximity is why it’s chosen for low-risk features and obscuring elevation changes, where you want the vehicle to hug the terrain. Contour mode, by contrast, follows terrain features but aims to stay at a constant height above ground along a predefined path, which can mean varying distances from the surface rather than staying as close as possible. Hover keeps the vehicle stationary in space, regardless of terrain below, and Level Flight maintains a steady altitude and straight path above the ground, not actively following terrain features. So, the mode described as surface to 25 feet above ground aligns with Nap of the Earth.

Nap of the Earth is the terrain flight mode that keeps the aircraft extremely close to the ground, essentially following the surface and its contours. Staying within a small vertical distance above the terrain—often described as surface to about 25 feet above ground level—defines this mode. That close proximity is why it’s chosen for low-risk features and obscuring elevation changes, where you want the vehicle to hug the terrain.

Contour mode, by contrast, follows terrain features but aims to stay at a constant height above ground along a predefined path, which can mean varying distances from the surface rather than staying as close as possible. Hover keeps the vehicle stationary in space, regardless of terrain below, and Level Flight maintains a steady altitude and straight path above the ground, not actively following terrain features.

So, the mode described as surface to 25 feet above ground aligns with Nap of the Earth.