How is Minimum Crossing Altitude noted on charts?

Minimum Crossing Altitude is indicated on charts by a small flag with an "X." This symbol serves a critical purpose in navigation, as it helps pilots identify the specific altitude they must reach by a certain point, usually when approaching a runway or intersecting airways. The use of this symbol ensures that pilots maintain adequate vertical separation from terrain and obstacles, which is essential for safe flight operations. In practice, recognizing this symbol allows pilots to plan their descent and approach more effectively, adhering to required altitudes to ensure a smooth and safe transition during flight phases.