Home' RTCA Documents for Review : C2 Link Systems MASPS_Draft Contents 11
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specific, verification procedures are to be interpreted as consistent with best practices, but
not totally prescriptive. It is acceptable that some verification tools may be external to the
C2 Link System, but can form an integral part of verification methodology. Verification
is an ongoing process throughout the development cycle and may flow down to the supplier
APPENDIX H contains the definitions of key terms and abbreviations.
APPENDIX A contains the development and descriptions of the CONOPS for UAS
operating in the U.S. airspace and explains the methodology used to develop the CONOPS
and scenarios used in the OSED (APPENDIX B) and to create the Operational Safety
Assessment (APPENDIX C) and the Operational Performance Assessment (APPENDIX
APPENDIX B contains the OSED for the C2 Link System. This describes the services,
intended functions, and associated procedures of the C2 Link System and the assumptions
about the environments in which it is to operate. It also contains operational and system
view diagrams that give illustrative descriptions of the steps of the fundamental activities
and the systems that comprise and affect the C2 Link System.
APPENDIX C contains the Operational Safety Assessment (OSA) for the C2 Link System.
This assessment, driven by the OSED, identifies potential safety-based hazards and
determines the minimum safety objectives necessary to ensure an acceptable level of
safety. These safety objectives were used to establish the safety performance requirements
cited in Section 3.
APPENDIX D contains the Operational Performance Assessment (OPA) for the C2 Link
System. This assessment, driven by the OSA and OSED, determines the minimum
performance requirements given in Section 3.
APPENDIX E contains an expanded description of the challenges involved within the
switching processes between/among satellite and terrestrial based systems that could be
part of the C2 Link System. This appendix provides information to the C2 Link System to
support switchover operations between point-to-point terrestrial radio systems (e.g., C
Band for potential use during takeoff and landing phases and BLOS SATCOM radio
system for potential use during en route and/or mission phase).
APPENDIX F contains a description of the security options that would be utilized in
addressing the mitigations identified in the OSA and the functional requirements within
Relationship to ICAO Documents
The ICAO is the branch of the United Nations that governs international air transportation
through a treaty mechanism. ICAO is preparing Standards and Recommended Practices
(SARPs) to deal with the international operations of UAS though their Remotely Piloted
Aircraft Systems (RPAS) Panel, a subset of their Air Navigation Commission. Following
the release, in 2015, of their Manual on Remotely Piloted Aircraft Systems , Doc 10019,
, they plan to develop SARPs for airworthiness of the RPAS. This would include (a)
the procedural and technical requirements of C2 Links and DAA Systems, pilot training
and licensing as well as (b) the Operational and Air Traffic Management for UAS
Instrument Flight Rules (IFR) operations conducted across international boundaries. The
RPAS Panel anticipates publishing their first SARPs by 2019 with subsequent releases
covering such areas as technology-specific SARPs for C2 Links over the following years.
Those SARPs are to allow safe and efficient air transportation around the world and are to
provide for a consistent minimum level of safety among all member nations. ICAO strives
to provide guidance for spectrum usage by aviation to achieve the goals of safe flight. For
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