In terms of aircraft weight, what classification includes aircraft weighing over 255,000 lbs?

The classification that includes aircraft weighing over 255,000 pounds is termed "Heavy." This designation is used to identify aircraft that have a significant impact on airport operations due to their size and mass. Heavy aircraft often require longer takeoff and landing distances and have considerations for wake turbulence that must be managed during flight operations.

The "Heavy" classification primarily applies to large commercial jets and cargo aircraft, ensuring that air traffic control and ground services can appropriately manage the operation of these substantial vehicles. By recognizing this classification, operators ensure safety protocols are adhered to, particularly in busy airports, to mitigate risks associated with the size and weight of these aircraft.

The other classifications—Small, Large, and Medium—do not encompass aircraft of this weight, making "Heavy" the correct choice in this context. These classifications pertain to lower weight thresholds and represent different capabilities, but none reach the scale of over 255,000 pounds which is unique to the "Heavy" category.