ASTM F3609-25

1.1 This specification covers requirements and classifications for positioning assurance, navigation, and time synchronization for unmanned aircraft systems.

1.2 This specification may support UAS-specific traffic management functions. This specification does not apply to operations that are under positive air traffic control (ATC).

1.3 The requirements and framework defined in this specification are not application- or solution-specific and may be applied to unmanned aircraft system traffic management (UTM), remote identification, other third party services, vehicle-to-vehicle communications, vendor-operator contracts, or other use cases.

1.4 This specification applies to both airworthiness and operational domains. Meeting the performance and other requirements may be by design, operational, or other means.

1.5 Units—The values stated in SI units are to be regarded as standard. Any values given in parentheses after SI units are provided for information only and are not considered standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.