Home' RTCA Documents for Review : C2 Link Systems MASPS_Draft Contents Appendix B
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Establishing the operating environment for the UAS is critical to establishing safety and
performance requirements. This environment consists of the regulatory environment, the
physical environment, and the operating environment in which the UAS is expected to
Current FAA Regulations and Related Guidance
The FAA, as it oversees the use of the NAS, applies the following key Code of Federal
Regulations (CFR), Job Orders (JOs) and Aeronautical Information Manual (AIM).
14 CFR Part 21 §21.17b: The major regulation that will be used in the certification of
UAS. This regulation allows for the customization of certification regulations required
to deal with the differences between manned aircraft and UAS. (See Aviation Safety
Organization, Section B.2.6).
14 CFR Part 91 and Part 135: Key aspects include (1) specific approval would be
required to carry cargo for compensation or hire, and (2) all operations must follow
IFR or receive authorization such as a Certificate of Waiver or Authorization (COA)
until the “see and avoid” capability can be achieved.
14 CFR Part 91 §91.113/115: This is the “see and avoid” regulation that is written in a
way that prohibits UAS from complying. Until this regulation is changed, all UAS
will require COAs to operate. The COAs may include operating limitations based on
the safety risk to the U.S. airspace posed by the aircraft and area of operation.
14 CFR Part 107: This applies to only small UAS, low altitude operations and a few
other conditions and is beyond the scope of this MASPS.
14 CFR 91.181: Course to be flown: Unless otherwise authorized by ATC, no person
may operate an aircraft within controlled airspace under IFR except as follows:
On an ATS route, along the centerline of that airway.
On any other route, along the direct course between the navigational aids or fixes
defining that route. However, this section does not prohibit maneuvering the
aircraft to pass well clear of other air traffic or the maneuvering of the aircraft in
VFR conditions to clear the intended flight path both before and during climb or
§91.111: Operating near other aircraft. This regulation states in part: “No person may
operate an aircraft so close to another aircraft as to create a collision hazard.” This
regulation is the basis for establishing the DAA (DAA) well clear standard.
14 CFR §91.123: Compliance with ATC clearances and instructions. This rule is
important to establishing the communicate requirements in this MASPS.
14 CFR §91.126: Operating on or in the vicinity of an airport in Class G airspace and
communicating with control towers. Unless otherwise authorized or required by
ATC, no person may operate an aircraft to, from, though, or on an airport having an
operational control tower unless two-way radio communications are maintained
between that aircraft and the control tower. This rule establishes requirements for the
UAS to maintain two-way voice communications with ATC facilities at airports.
14 CFR §91.127: Operating on or in the vicinity of an airport in Class E airspace and
communicating with control towers. Unless otherwise authorized or required by ATC,
no person may operate an aircraft to, from, through, or on an airport having an
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