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AIM

10/12/17

2−3−30

Airport Marking Aids and Signs

2−3−14. Aircraft Arresting Systems

a. Certain airports are equipped with a means of

rapidly stopping military aircraft on a runway. This

equipment, normally referred to as EMERGENCY

ARRESTING GEAR, generally consists of pendant

cables supported over the runway surface by rubber

“donuts.” Although most devices are located in the

overrun areas, a few of these arresting systems have

cables stretched over the operational areas near the

ends of a runway.

b. Arresting cables which cross over a runway

require special markings on the runway to identify

the cable location. These markings consist of 10 feet

diameter solid circles painted “identification yel-

low,” 30 feet on center, perpendicular to the runway

centerline across the entire runway width. Additional

details are contained in AC 150/5220−9, Aircraft

Arresting Systems for Joint Civil/Military Airports.

NOTE−

Aircraft operations on the runway are not restricted by the

installation of aircraft arresting devices.

c. Engineered Materials Arresting Systems

(EMAS). EMAS, which is constructed of high

energy−absorbing materials of selected strength, is

located in the safety area beyond the end of the

runway. EMAS will be marked with yellow chevrons.

EMAS is designed to crush under the weight of

commercial aircraft and will exert deceleration forces

on the landing gear. These systems do not affect the

normal landing and takeoff of airplanes. More

information concerning EMAS is in AC

150/5220−22, Engineered Materials Arresting Sys-

tems (EMAS) for Aircraft Overruns.

NOTE−

EMAS may be located as close as 35 feet beyond the end of

the runway. Aircraft and ground vehicles should never taxi

or drive across the EMAS or beyond the end of the runway

if EMAS is present.

FIG 2−3−42

Engineered Materials Arresting System (EMAS)