Frangible object | Article about frangible object by The Free Dictionary
An object of low mass designed to break, distort, or yield on impact so as to present the minimum hazard to aircraft (ICAO). Objects located in the vicinity of operating surfaces should be frangible so that if an aircraft hits them inadvertently, there is minimal damage.
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ICAO defines a frangible object
as one of low mass designed to break, distort or yield on impact so as to present the minimum hazard to aircraft.