NDB letdown

NDB letdown
A nonprecision approach carried out with the help of an NDB (nondirectional beacon). The aircraft homes to the beacon and arrives overhead. It turns outbound and flies level for a specific period of time, depending upon the altitude, after which descent is commenced. At a precalculated time, the aircraft turns inbound and homes onto the beacon. It reduces its rate of descent at the check altitude and levels out at the break-off altitude. In some procedures, the aircraft carries out a procedure turn instead of the above procedure. On aeronautical charts, an NDB is shown by the symbol . See also letdown.
Procedure for NDB let down as given on approach charts.

Aviation dictionary. 2014.

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Look at other dictionaries:

  • letdown — The procedure adopted commencing from the top of the descent at the end of cruising through the approach for landing. It does not include the terminal part of the final approach. The various types of letdown are the NDB (nondirection beacon) let… …   Aviation dictionary

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