What is an unpublished RNAV route?

Related questions

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5. What is aircraft etops?
6. How is airspace controlled?
7. Is Class D controlled airspace?
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9. What is the difference between controlled and uncontrolled airspace?
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Tags

1. #aircraft
2. #monitoring
3. #required
4. #anytime
5. #flying
6. #provides
7. #associated
8. #unpublished
9. #clearance
10. #radar
11. #current
12. #charted
13. #terrain
14. #minimum
15. #route
16. #altitude
17. #always