Voir http://www.aero-hesbaye.be/dossiers/GPS/gps.html sur le WAAS
WAAS: http://en.wikipedia.org/wiki/Wide_Area_Augmentation_System et http://www.garmin.com/fr/waas
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Sur le Bad Elf Pro (version Pro+ : environ 300 euros
[youtube https://www.youtube.com/watch?v=Nyj1xTsU78s?rel=0&w=1280&h=720]
Bad-Elf-UserGuide-BE-GPS-2300-20140517
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Sur le Garmin GPS Glo : environ 130 euros
[youtube https://www.youtube.com/watch?v=xh3_7cuBQlk?rel=0&w=1280&h=720]
