Pilot Trainer App
https://apps.apple.com/us/app/radio-navigation-aids-trainer/id1436241324
https://play.google.com/store/apps/details?id=com.PilotEffect.NavAidPro
https://github.com/MarioMarioS/Radio-Navigation-Aids-Trainer-Public/blob/6ad13624c63d828bbdfa05cb76e581abd93f1976/Radio-Navigation-Aids-Trainer.cs
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