IRELAND · PDRA Overview
PDRA-S02 and PDRA-G01: What Are They and How to Apply Them?
For professional drone operators in Europe, Predefined Risk Assessments (PDRAs) are essential tools within the Specific category of European drone legislation. These standardized risk assessments assist in obtaining operational approvals by providing predefined risk profiles. In this article, we explain the differences and similarities between PDRA-S02 and PDRA-G01, and offer practical tips on how to use them for compliant and safe flight operations.
What Are PDRA-S02 and PDRA-G01?
PDRA-S02 and PDRA-G01 are Predefined Risk Assessments developed by EASA to facilitate specific drone operations within the Specific category. They contain pre-analyzed risk profiles that allow UAS operators to apply for operational approvals more swiftly. These PDRAs include fixed operational conditions regarding UAS type, flight methods, and environmental factors.
Differences in Scope and Characteristics
Although PDRA-S02 and PDRA-G01 have similar names, they differ in content and usage.
- **PDRA-S02** focuses on BVLOS (Beyond Visual Line Of Sight) operations with a maximum range of 1 km, extendable to 2 km if dedicated airspace observers are deployed. It is designed for drones with a maximum take-off mass (MTOM) up to 25 kg and a wingspan up to 3 metres. Flights operate over controlled land in areas with low population density, and up to 150 metres above ground level.
- **PDRA-G01** is intended for longer-range BVLOS operations utilising airspace observers and may apply to flights in both controlled and uncontrolled airspace. It shares the same maximum flight altitude of 150 metres and covers similar drone classes.
- Both PDRAs target surveillance and light cargo missions, with PDRA-G01 optimised for extended distance flights.
Importance of Current Regulations and National Conditions
Using a PDRA does not automatically grant permission to operate in Irish airspace. The Irish Aviation Authority (IAA) oversees compliance not only with EASA regulations but also with national safety and airspace requirements.
Some BVLOS operations or airspace scenarios allowed under a PDRA at the European level may have additional restrictions in Ireland. Operators must verify that their intended operation complies with any prevailing national measures, for example, by consulting official IAA publications and NOTAMs.
Furthermore, UAS operators need a valid operational manual that translates the PDRA conditions into their Concept of Operations (ConOps), clearly describing how limits and mitigations are integrated within their procedures.
How to Implement a PDRA in Your Operation
Implementation involves submitting a detailed application to the IAA, including a completed PDRA compliance table and an operational manual showing how all operational constraints, technical requirements, and workflows are met.
Key considerations include:
- Assignment and training of personnel responsible for airspace observation and monitoring during the mission;
- Methods to ensure containment and safety zones around the drone to prevent unauthorized airspace infringements;
- Clear criteria and procedures for safe mission abortion or contingency handling in case of anomalies or emergencies.
Checklist for Choosing and Using PDRA-S02 or PDRA-G01
To decide which PDRA suits your operation best, assess the following:
Consider flight parameters, drone specifications, and environmental context carefully before application.
- Is the flight operated within Visual Line of Sight (VLOS) or Beyond Visual Line of Sight (BVLOS)?
- What is the drone’s model, maximum take-off mass (MTOM) and wingspan?
- In which airspace is the operation conducted: controlled, uncontrolled, or controlled ground area?
- What are the intended flight altitude and horizontal distance?
Frequently asked questions
Can software automatically determine which PDRA applies?
Software tools may assist with comparing your operation’s parameters against PDRA criteria, but the final judgement and confirmation remain with the UAS operator. Regulatory compliance and operational conditions must always be verified personally and through current official sources.
Is it allowed to use only certain parts of a PDRA?
No. A PDRA is a complete set of conditions that the entire operation must satisfy. Selective application or modification without explicit approval invalidates the PDRA and necessitates another risk assessment route, such as a full SORA, and a different approval process.
How does a PDRA relate to the national rules of Ireland?
PDRAs provide a harmonised European baseline. However, the IAA may require additional or stricter measures depending on national safety priorities and airspace management policies, particularly for BVLOS operations and flights near controlled airspace.
Do I always need to adjust an operational manual when using a PDRA?
Yes. The operational manual or ConOps must express how your organisation practically implements the PDRA conditions. This documentation is essential for demonstrating compliance during the IAA’s approval and oversight processes.
What is the difference between a PDRA and a SORA?
A PDRA is a predefined risk assessment with a fixed set of conditions tailored for standard operation types, designed to streamline approval. A SORA (Specific Operations Risk Assessment) is a bespoke, comprehensive risk assessment method used when an operation falls outside existing PDRAs.