Which feature identifies OROCA on a navigation chart?

Which feature identifies OROCA on a navigation chart?

• A. Large Tan Number on the Chart
• B. Blue Line
• C. Red Circle
• D. Green Triangle

Answer: (A)

OROCA stands for Off-Route Obstacle Clearance Altitude. It’s the published altitude you should stay above when you’re off the published route to ensure obstacles in the area are cleared. On IFR enroute charts, this safe altitude is shown as a large tan number. The tan color and big size are used specifically to make this datum easy to spot among other chart information, and the value is expressed in feet MSL. This distinctive presentation helps you quickly identify the off‑route clearance you should use if you’re not following a published route. The blue line, red circle, and green triangle represent other chart features or symbols, not OROCA, so they don’t indicate this altitude.

OROCA stands for Off-Route Obstacle Clearance Altitude. It’s the published altitude you should stay above when you’re off the published route to ensure obstacles in the area are cleared.

On IFR enroute charts, this safe altitude is shown as a large tan number. The tan color and big size are used specifically to make this datum easy to spot among other chart information, and the value is expressed in feet MSL. This distinctive presentation helps you quickly identify the off‑route clearance you should use if you’re not following a published route.

The blue line, red circle, and green triangle represent other chart features or symbols, not OROCA, so they don’t indicate this altitude.