Neil:
Yes it is about hearing a station. But sometimes you have to follow the trail of bread cumbs (a carrier or het) to the find program content. But one must hear some program content identifying the station before it can be considered logged.
And yes, hearing a het or carrier over a long distance can be considered an achievement. However, you cannot say it has been actually logged.
An example is the heterodyne I hear nearly every evening on 1521 kHz. I know it's origin, but because I've yet to hear more than the het, it remains listed as "unID" in my logbook. But being able to hear the het on a small transistor receiver over several thousand miles, across an ocean is an achievement, no matter how routine.
Good DX.
Richard.
Richard Allen
36°22'51"N / 97°26'35"W
(near Perry OK USA)
Still learning from others after over 50 years of medium wave DXing experience.