[Milsurplus] Trans Oceanic MW receptio

[Smith]

Lets don't forget aural null  techniques , with the BFO it is usable down
to the  microvolt level or less, storms or no storms, you don't follow the
needle you listen with the ears.  The hard part with this  weak signal is
identifiying the station. You don't want to null on the wrong signal.

Once upon a time when an aircraft was returning from MacMurdo to
Christchurch its gyros strated an unusual precession and it wandered way
off course,  the crew was forced to aural null off of a AM broadcast
station in New Zealand. But they didn't know if it was New Zealand
broadcast station or an  Australia etc. A very bright Naval Duty Officer
who was talking to the aircraft on HF, simply called up the AM broadcast
station and asked them to give one minute of silence.  The aircraft crew
had  the BFO on then easily noticed that it has gone off the air, thus they
had positive ID and proceeded to home plate. The nulls were very broad but
close enough to get the bird heading in the right direction.

Breck K4CHE