1.1 本实践的重点是准备操作风险评估（ORA），用于支持无人驾驶飞机系统（UAS）的设计、适航性以及随后向CAA申请批准低空操作（例如，低于400英尺AGL）。 1.2 在减轻和预防事件和事故方面，人们的理解是，人们一般不寻求造成损害或伤害他人，因此，恶意行为不属于这一做法的范围。 1.3 作为ORA的一部分，申请人应清楚地理解并能够阐明他们的预期任务，以评估安全性并向CAA提供信息。UAS行动（任务或一组任务）的文档被许多人称为行动概念（CONOPS）。 2 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This practice focuses on preparing operational risk assessments (ORAs) to be used for supporting unmanned aircraft systems (UAS) design, airworthiness, and subsequent applications to the CAA for approval of low altitude operations (for example, below 400 ft AGL). 1.2 In mitigating and preventing incidents and accidents, it is understood that people generally do not seek to cause damage or injure others, and therefore, malicious acts are beyond the scope of this practice. 1.3 As part of the ORA, the applicant should clearly understand and be able to articulate their intended mission for purposes of assessing safety and providing information to the CAA. This documentation of a UAS operation (mission, or set of missions) is what many refer to as a concept of operations (CONOPS). 2 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.