Don't ask me where I found it (temporary memory failure), but this image shows the aviation beacons in use in The Netherlands in the 1920s/30s (best guess). As there is a marking labeled 'London', I would guess that the line of beacons extended at least to the point on the coast where the airliner would set off across the Channel, but perhaps beyond that to an airport near London. The dotted lines are shown as a 'nachtvluchtroute' which translates as a route for night flying. Five pointed stars are coastal lighting, while the other type of star denotes a 'luchtvaartlicht' or aviation light beacon. This ties in with the description of aeronautical lighthouses in Rallye Driver's link above.
