![]() 54 to 108 KM) from the transmitter, especially just before sunrise and just after sunset Radio waves can be reflected back by the ionosphere and can cause fluctuations 30 to 60 NM (approx.Since ADF receivers do not have a "flag" to warn the pilot when erroneous bearing information is being displayed, the pilot should continuously monitor the NDB's identification.Voice, music or erroneous identification may be heard when a steady false bearing is being displayed.Noisy identification usually occurs when the ADF needle is erratic.Nearly all disturbances which affect the Automatic Direction Finder ( ADF) bearing also affect the facility's identification.Such disturbances result from factors such as lightning, precipitation static, etc.Radio beacons are subject to disturbances that may result in erroneous bearing information.The second needle typically points to a VOR station.Combines radio and magnetic information to provide continuous heading, bearing and radial information.Single-Needle Radio Magnetic Indicator:.The ADF needle will directly indicate the magnetic bearing to the NDB when the aircraft heading is shown at the top.Magnetic Bearing: Distance from magnetic north.Relative Bearing: Degrees flown to station (clockwise).(relative bearing) + (magnetic heading) = (magnetic bearing).Visualizing the situation with this type of indicator can be daunting. ![]() Always represent the nose of the aircraft at 0° and the tail as 180°.A fixed compass card simply means the face of the instrument cannot rotate, leaving only the needles to move.Dual-needle Radio Magnetic Indicator ( RMI).Single-needled Radio Magnetic Indicator ( RMI).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |