# Commission Delegated Regulation (EU) 2019/945 of 12 March 2019 on unmanned aircraft systems and on third-country operators of unmanned aircraft systems, Part 5: Requirements for a class UK4 Unmanned aircraft system

Extent: E+W+S+N.I.

A class UK4 UAS bears the following label on the UA in a visible manner:
A class UK4 UAS shall comply with the following:
(1) have an MTOM of less than 25 kg, including payload;
(2) be safely controllable and manoeuvrable by a remote pilot following the manufacturer’s instructions, as necessary under all anticipated operating conditions including following the failure of one or, if appropriate, more systems;
(3) not be capable of automatic control modes except for flight stabilisation assistance with no direct effect on the trajectory and lost link assistance provided that a pre-determined fixed position of the flight controls in case of lost link is available;
(4) be placed on the market with manufacturer’s instructions providing:
(a) the characteristics of the UA including but not limited to the:
class of the UA
UA mass (with a description of the reference configuration) and the maximum take-off mass (MTOM);
general characteristics of allowed payloads in terms of mass, dimensions, interfaces with the UA and other possible restrictions;
equipment and software to control the UA remotely; and
and a description of the behaviour of the UA in case of a loss of the command and control link;
(b) clear operational instructions;
(c) maintenance instructions;
(d) troubleshooting procedures;
(e) operational limitations (including but not limited to meteorological conditions and day/night operations); and
(f) appropriate description of all the risks related to UAS operations;
(5) include an information notice published by the CAA providing the applicable limitations and obligations, in accordance with Implementing Regulation (EU) 2019/947.

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Source: https://www.legislation.gov.uk/eur/2019/945/annex/part/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-945/annex/part-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.