What is the difference between altitude and elevation?

The distinction between altitude and elevation is crucial in aviation and geography. Altitude refers specifically to the height of an object or point in the air relative to the ground immediately below it. In contrast, elevation indicates how high a geographical location is above a defined baseline, typically sea level.

The correct choice emphasizes that altitude is specifically referenced from above ground level, which is particularly relevant for aircraft in flight. In aviation, knowing the altitude helps pilots ensure safe clearance above terrain and obstacles. Meanwhile, elevation is a broader term that can apply to any point of land, such as hills, mountains, or flat fields, in relation to sea level.

Understanding this difference is essential for pilots to communicate effectively and plan flight paths safely, as they must be aware of both altitude and elevation to manage airspace and terrain navigation properly.