Annex B – AMC1 Strategic Mitigations for Ground Risk

CAA ORS9 Decision No. 46

1. Introduction
1.1 Annex B provides the integrity and assurance requirements for the Applicant’s proposed mitigations. The proposed mitigations are intended to reduce the intrinsic Ground Risk Class (iGRC) associated with a given operation. The identification and implementation of the mitigations are the responsibility of the Applicant.
1.2 A proposed mitigation may or may not have a positive effect on reducing the ground risk associated with the operation. In the case where a mitigation is available but does not reduce the ground risk, its level of integrity should be considered “None”.
1.3 To achieve a given level of robustness, when more than one criterion exists for that level of robustness, all applicable criteria need to be met, unless specified otherwise.
1.4 If a criterion is not applicable to a mitigation, e.g. passive mitigations do not require training nor activation, the criterion may be ignored.
1.5 Annex B mitigations are primarily applied to the operational volume and ground risk buffer.
1.6 The GRC may not be lowered to a value less than the corresponding value for a controlled ground area.
1.7 A number of requirements, such as those labelled “Technical design”, would typically require the support of the UAS or equipment Designer, unless they have already been complied with by the Designer through a SAIL mark certificate. See GM1 to Article 11(6) for further information on RAE-F and SAIL Mark.
1.8 The applicant may claim more points of GRC reduction than indicated in Step 3 of the UK SORA process, when the appropriate orders of magnitude of reduction of the risk to uninvolved people may be demonstrated. Any of these claims should be fulfilled to the high robustness level. For example, a reduction by 3 points to the final GRC may be granted by the CAA for an M2 mitigation if the Applicant may demonstrate a reduction of 3 orders of magnitude of the risk to uninvolved people. This would be achieved by showing a 99.9% reduction of the risk to uninvolved people in Criterion 1, with Criteria 2 and 3 complied with to a high robustness level.