tango4 wrote:

Beer cans grew out of the use of the early GPS systems that were unable to
accept the programming of a sector based 'observation zone'. The really
silly thing is that now the technology has caught up we have just embedded
the beercan more firmly in the rules.

Beer can turnpoints were already in use the USA long before GPS came
along, when we were using cameras in our contests. It was not a new
invention, as least for us. It was much easier to use (pilots and photo
interpertation) than the 90 degree sector with cameras and GPS.

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Eric Greenwell
Washington State
USA