Which flag indicates Minimum Crossing Altitude or Minimum Turning Altitude?

Which flag indicates Minimum Crossing Altitude or Minimum Turning Altitude?

• A. Flag with X
• B. Flag with R
• C. Flag with O
• D. Flag with A

Answer: (A)

Minimum Crossing Altitude and Minimum Turning Altitude are altitude limits used on instrument procedures to ensure obstacle clearance during approach and maneuvering. On navigation charts, these minima are marked with a flag that has an X. When you see the X flag by a fix, you must cross that fix at or above the published altitude, and if a turn is involved, you must begin the turn at or above the published minimum turning altitude. This symbol lets you quickly identify where you must maintain a certain altitude to stay safe, regardless of other chart features. Other flags on the chart indicate different items or restrictions, but they do not denote MCA or MTA, so the X flag is the correct indicator.

Minimum Crossing Altitude and Minimum Turning Altitude are altitude limits used on instrument procedures to ensure obstacle clearance during approach and maneuvering. On navigation charts, these minima are marked with a flag that has an X. When you see the X flag by a fix, you must cross that fix at or above the published altitude, and if a turn is involved, you must begin the turn at or above the published minimum turning altitude. This symbol lets you quickly identify where you must maintain a certain altitude to stay safe, regardless of other chart features. Other flags on the chart indicate different items or restrictions, but they do not denote MCA or MTA, so the X flag is the correct indicator.