From its beginning in the early 1930s, the LFR was augmented with Low Frequency Non-directional beacons (NDBs), which were simple, single-antenna transmitters, whose radio emission pattern was uniform in all directions in the horizontal plane.
NDBs were simple, single-antenna transmitters, whose radio emission pattern was uniform in all directions in the horizontal plane. From its beginning in the early 1930s, the LFR was augmented with Low Frequency Non-directional beacons (NDBs).
From its beginning in the early 1930s, the LFR was augmented with Low Frequency Non-directional beacons (NDBs). NDBs were simple, single-antenna transmitters, whose radio emission pattern was uniform in all directions in the horizontal plane.
From its beginning in the early 1930s, the LFR was augmented with Low Frequency Non-directional beacons (NDBs). NDBs were simple, single-antenna transmitters, whose radio emission pattern was uniform in all directions in the horizontal plane.