When conducting an operation not covered by a STS or a PDRA, applicants are required to conduct a risk assessment, identify mitigations and comply with safety objectives. The risk assessment methodology, known as SORA (Specific Operations Risk Assessment), is developed for this purpose.

The Predefined Risk Assessment (PDRA) is an operational scenario for which EASA has already carried out the risk assessment and has been published as an acceptable means of compliance (AMC) to the Article 11 (risk assessment) of Regulation (EU) 2019/947.

La SORA est une méthode d'analyse des risques utilisée pour solliciter une demande d'autorisation d'exploitation d'aéronefs sans équipage à bord (drones) en catégorie Spécifique (voir ici).

Pre-defined risk assessments (PDRAs) The current PDRA package being developed by the Joint Authorities for Rulemaking on Unmanned Systems (JARUS) will be reviewed as part of the UK SORA project and if acceptable, we will adopt them in …

• Conduct operations covered by PDRA without ask for authorisation • Assess the risk of new operations through SORA and conduct the operation without ask for authorisation

Any drone flight which cannot be covered by either an STS or a PDRA requires an application in accordance with SORA which is specific to the proposed operation. What is it about? The FOCA and EASA have developed a total of three types of procedure for authorising complex drone operations (CH-STS, EU-STS, PDRA), all based on the SORA methodology.

Through applying the SORA, you can determine both the risks on the ground (Ground Risk Class, GRC) and in the air (Air Risk Class, ARC) caused by the UAS operation. It also provides mitigations that can reduce these risks to an acceptable level.

SORA: Apply for authorisation through a Specific Operation Risk Assessment (SORA) for each type of operation. PDRA: Apply by using a Predefined Risk Assessment (PDRA). This is a pre-made SORA for the operator. STS: Declare to operate using a standard scenario (STS).

Aug 13, 2021 · SORA (Specific Operations Risk Assessment) is a multi-stage process of risk assessment aiming at risk analysis of certain unmanned aircraft operations, as well as defining necessary mitigations and operational safety objectives and their required level of robustness.

Nov 4, 2020 · The Specific Operations Risk Assessment (SORA) is a 10-steps process aiming to evaluate the risks and determine the acceptability of a UAS operation in the ‘specific’ category.