On High Altitude enroute charts, airports have at least one hard surfaced runway with a minimum runway length of how many feet?

On High Altitude enroute charts, airports have at least one hard surfaced runway with a minimum runway length of how many feet?

• A. 4000 feet
• B. 5000 feet
• C. 6000 feet
• D. 7000 feet

Answer: (B)

On High Altitude enroute charts, the airports highlighted are those with a hard-surfaced runway long enough to support safe takeoff and landing under the performance limits you’ll see at high density altitude. The minimum length shown is five thousand feet. This threshold strikes a practical balance: it includes airports that can reasonably accommodate many general aviation and small transport aircraft when the air is thin and temperatures can raise takeoff and landing distances, while excluding shorter or unimproved fields that aren’t reliable options in high-altitude conditions. The requirement for a hard-surfaced runway ensures the performance is predictable, since grass, gravel, or mud runways can behave very differently. So five thousand feet is the standard minimum for that charting purpose.

On High Altitude enroute charts, the airports highlighted are those with a hard-surfaced runway long enough to support safe takeoff and landing under the performance limits you’ll see at high density altitude. The minimum length shown is five thousand feet. This threshold strikes a practical balance: it includes airports that can reasonably accommodate many general aviation and small transport aircraft when the air is thin and temperatures can raise takeoff and landing distances, while excluding shorter or unimproved fields that aren’t reliable options in high-altitude conditions. The requirement for a hard-surfaced runway ensures the performance is predictable, since grass, gravel, or mud runways can behave very differently. So five thousand feet is the standard minimum for that charting purpose.