- Selection and Use of Time and Frequency Sources for all Systems, Services, and Applications Supporting NAS Operations
- Date issued
- Office of Primary Responsibility
- ANG-B, NEXTGEN
- Access restriction
- Order purpose statement
This Order establishes the Policy by which Federal Aviation Administration (FAA) time and frequency sources will be selected, modified, upgraded, implemented, and used by systems, services, and applications supporting National Airspace System (NAS) operations in order to ensure safety, security, required performance, and resilience.
- 1770.68 (PDF)
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