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Federal Register / Vol. 86, No. 222 / Monday, November 22, 2021 / Rules and Regulations must show that an unmanned aircraft or broadcast module produced using it would meet the performance requirements of title 14 of the Code of Federal Regulations part 89 14 CFR part 89. This policy statement only addresses the performance requirements and compliance path for the standard remote identification unmanned aircraft.
Part 89 requires the following 8
message elements to be broadcast from a standard remote identification unmanned aircraft: 1 Unmanned aircraft unique identifier; 2 an indication of the control stations latitude and longitude; 3 an indication of the control stations altitude; 4 an indication of the unmanned aircrafts latitude and longitude; 5 an indication of the unmanned aircrafts altitude; 6
a time mark; 7 an indication of the emergency status of the unmanned aircraft system; and 8 velocity.
Additionally, all standard remote identification unmanned aircraft must meet certain minimum requirements regarding the transmission of the message elements including the minimum performance requirements related to positional accuracy, geometric altitude accuracy, message latency, and message transmission rate. These minimum performance requirements for the message elements are design requirements; any specific test method for ensuring that the unmanned aircraft design meets this accuracy requirement will be reviewed and evaluated by the FAA as a part of the means of compliance acceptance process.
Part 89 establishes the accuracy requirement for the reported geometric altitude for the control station of a standard remote identification unmanned aircraft. Specifically, 89.310h2 requires that the reported geometric altitude of the control station must be accurate to within 15 feet of the true geometric altitude, with 95 percent probability. The Remote ID final rule did not specify how a means of compliance should address this requirement. In order to guide producers to develop standard remote identification unmanned aircraft that meet the FAAs standards, this policy statement informs developers of one potential means of compliance that would be acceptable to the FAA to demonstrate compliance with meeting the geometric altitude requirement.
Persons developing a means of compliance for a standard remote identification unmanned aircraft in accordance with 14 CFR part 89, subpart E, may incorporate the method described in this policy statement as part of their means of compliance. The
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FAA emphasizes, however, that other ways of demonstrating compliance with 89.310h2 may be acceptable.
B. Statement of Policy: Acceptable Method This statement of policy describes one acceptable way, but not the only way, that the accuracy requirements for the reported geometric altitude of the control station of a standard remote identification unmanned aircraft can meet the minimum performance requirement in 89.310h2. The FAA
is not requiring developers of means of compliance to include the specific method provided in this statement of policy.
A means of compliance that requires the unmanned aircraft system UAS
control station position source to be a global navigation satellite system GNSS receiver utilizing Global Positioning System GPS and Wide Area Augmentation System WAAS
satellite signals to determine the geometric altitude of the control station would be an acceptable method for a means of compliance to demonstrate that the unmanned aircraft built according to its specifications would meet the accuracy requirement in 89.310h2. The WAAS Performance Analysis report from the second quarter of 2021 shows that GNSS receivers utilizing GPS with a satellite-based augmentation system indicates a worstsite 95% vertical accuracy of 5 feet for the continental United States.4 This report demonstrates that GNSS receivers utilizing GPS/WAAS can achieve the necessary vertical position accuracy across the National Airspace System to meet the reported geometric altitude requirement of 89.310h2.
The FAA recognizes that UAS
technology, which includes remote identification technology, is continually evolving and improving. Accordingly, the FAA expects that other methods may be available to meet this requirement other than the one mentioned in this policy statement, and nothing about this statement should preclude developers of means of compliance from including other technological methods of meeting the vertical accuracy requirements for the reported geometric altitude of the control station. This statement of policy solely addresses one method of demonstrating compliance with 89.310h2; note that any means of compliance submitted to the FAA must also adequately address the other
requirements in part 89, subparts D and E, in order to be accepted by the FAA.
II. Additional Information A. Electronic Access and Filing A copy of the Remote ID final rule as well as all background materials may be viewed online at https
www.regulations.gov using the docket number listed above. A copy of this statement of policy will also be placed in the docket for that rule. Electronic retrieval help and guidelines are available on the website. It is available 24 hours each day, 365 days each year.
An electronic copy of this document may also be downloaded from the Office of the Federal Registers website at https www.FederalRegister.gov and the Government Publishing Offices website at https www.GovInfo.gov.
Copies may also be obtained by sending a request to the Federal Aviation Administration, Office of Rulemaking, ARM1, 800 Independence Avenue SW, Washington, DC 20591, or by calling 202 2679677. Requestors must identify the docket or amendment number of this rulemaking.
B. Integration of This Policy Into FAA
Orders and Publications As appropriate, the FAA will incorporate this policy into applicable FAA Orders and publications, such as Advisory Circulars, as they are updated.
The agency will also continually review this policy in the interest of aviation safety. The FAA reserves the right to update this policy if the agency collects or receives additional information.
This policy does not have the force and effect of law and is not meant to bind the public in any way, it is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.
Issued in Washington, DC, on or about November 16, 2021.
Michael C. Romanowski, Aviation Safety Director, Policy and Innovation, Aircraft Certification Service.
FR Doc. 202125366 Filed 111921; 8:45 am BILLING CODE 491013P

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