What does U S mean in a notam?

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Tags

  1. #system
  2. #regarding
  3. #temporary
  4. #order
  5. #direction
  6. #components
  7. #notam
  8. #airmen
  9. #national
  10. #information
  11. #distribute
  12. #changes
  13. #notices
  14. #prescribes
  15. #unanticipated
  16. #format
  17. #airspace
  18. #hazards
  19. #services