markings. The "Threshold" shows the beginning of the runway where an airplane can land.

The "Centerline" helps the pilot maintain the airplane right in the middle of the runway.

The "Aiming point" acts as a reference to touch down in the "Touchdown zone". A runway

may also have a "Displaced threshold". A displaced threshold is an extended area for an airplane

to takeoff but not land. A "Blast pad" is an area to protect objects and people from

jet wash. But what is "Jet wash"? Jet wash is fast moving air created by a jet engine.

Another word to remember since we're talking about runways is "Wind sock". A wind sock

measures a winds direction and velocity. Thanks again for watching this video and if you want

to learn more about aviation english then visit my website at www.easyaviationenglish.com