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The Future Flight Standards Hub is designed to accelerate the development of Future Flight demonstrators and wider industry innovation based on emerging best practice, knowledge sharing, and standards support.

  • BSI Flex 1903 v2:2024-06 community preview

    This is an interactive version 2 of BSI Flex 1903. The aim of the standard is to create a lexicon of standard terms and acronyms used in this sector. Please note, content is still undergoing internal review and there may be minor changes at full publication.

    We welcome your engagement and comments on this version to help inform the development of the standard. We would also welcome general feedback including what terms could be considered for future versions and these can be made through our dedicated feedback page .

command and control (C2) link



  • Definition

    command-and-control data link between uncrewed aircraft (UA) (3.1.134) and its command unit for the purposes of managing the flight


    NOTE Descriptions of how a C2 link is achieved include the terms “direct command and control (C2) link (3.1.57) and “network command and control (C2)(3.1.104).


    [SOURCE: UK CAA, CAP 722D, Unmanned aircraft system operations in UK airspace: Abbreviations and master glossary, modified – “a remotely piloted aircraft” replaced by “an uncrewed aircraft; “remote pilot station” replaced by “command unit”] [6]

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