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AMC2 ACNS.E.TAWS.010 Required functions

ED Decision 2013/031/R

In case of descent the TAWS should provide an automatic call out when descending through a predefined altitude (typically 150 m (500 ft) above terrain or above the elevation of nearest runway).

For a Class B TAWS in order to compensate for the lack of ‘excessive closure rate to terrain’ function the predefined altitude should be 500ft.