Hints and tips:
...(Long lines of acetylene lamps and towers topped with electrically illuminated beacons were erected in the 1920s; the last was extinguished in 1973....
...“You either had to come in by boat down a fjord or fly in [Doug had a Cessna] in vicious weather.”...
...Socata originally proposed an all-composite aircraft in 1973 – a step too radical for buyers....
International Edition