STS-02 Explained for Drone Operators in Ireland

What Is STS-02?

STS-02 is a predefined Standard Scenario allowing for BVLOS operations of unmanned aircraft systems under specific operational and technical conditions. It is designed to simplify the approval process by setting harmonised requirements that, when met, replace the need for full risk assessments such as a complete SORA.

Key features of STS-02 include:

• UAS must be classed as C6 under EASA’s CE-classification, indicating a maximum takeoff mass (MTOM) up to 25 kg and a maximum characteristic dimension of 3 metres.
• Operations must be performed over a controlled ground area located in a sparsely populated environment to minimise risks to uninvolved people.
• Maximum horizontal distance from the remote pilot to the drone is 2 km if airspace observers are deployed; without observers, a maximum of 1 km applies.
• Flight altitude is limited to 120 metres above ground level.
• The scenario allows flights in both controlled and uncontrolled airspace under the condition that the likelihood of encountering manned aircraft remains very low.
• UAS must be equipped with an active and updated direct remote identification system, and carrying dangerous goods is not permitted under this STS.
• Operators are required to comply with specific operational limitations, conduct appropriate risk mitigations, and maintain operational control within a defined volume.

Importance of STS-02 for Irish Drone Operators

STS-02 offers a practical path for professional and commercial drone operators in Ireland to conduct BVLOS operations more efficiently. By following this standard scenario, operators benefit from reduced administrative burden compared to those needing bespoke authorisations.

The scenario supports safe integration of UAS into Irish airspace by ensuring established safety margins and harmonised technical standards are met, which helps build confidence with the Irish Aviation Authority (IAA) and other stakeholders.

Requirements to Operate Under STS-02 in Ireland

To apply STS-02, the drone and operation must conform to EASA’s technical and operational criteria, including having a C6 CE class label on the drone and operating over a verified controlled ground area with low population density.

Operators must prepare and maintain an operations manual that includes procedures aligned with STS-02 specifications, such as Emergency Response Planning (ERP) and Ground Risk Classification (GRC). The remote pilot must hold appropriate training and certification relevant to STS-02 BVLOS activities.

Prior to commencing flights, operators must submit an operational declaration to the IAA detailing their intended use of STS-02, comply with any national notifications requirements, and ensure insurance coverage is in place. These steps facilitate regulatory oversight and contribute to safe, compliant UAS activity in Irish airspace.

Practical Advice and Common Pitfalls

A common mistake is failing to verify the drone’s CE classification or forgetting to confirm that it holds a valid C6 label, which is mandatory for STS-02 operations.

Operators sometimes exceed the distance limits prescribed between the remote pilot and the drone or neglect to deploy required ground observers when operating at distances greater than 1 km. Such oversights compromise safety and breach regulatory limits.

Additionally, insufficiently detailed Concept of Operations (ConOps) and incomplete documentation of communication protocols or Emergency Response Plans can hinder demonstrating regulatory compliance during audits or inspections by the IAA.

Checklist for Safe and Compliant STS-02 Operations

To ensure safe and regulation-compliant STS-02 operations in Ireland, operators should follow this concise checklist:

• Confirm the drone bears a valid C6 CE-class label.
• Verify the operational area qualifies as a controlled ground area in a sparsely populated environment.
• Abide by the maximum horizontal range limits to remote pilot (1 km without observers, 2 km with observers) and do not exceed 120 metres altitude.
• Prepare and maintain a detailed Concept of Operations (ConOps) and Emergency Response Plan (ERP).
• Ensure remote pilots hold required STS-02 relevant practical skill training certification.
• Notify the Irish Aviation Authority (IAA) as required by national procedures before conducting operations.
• Maintain and update operational manuals incorporating STS-02 procedures, risk assessments, and safety mitigations.
• Ensure appropriate insurance coverage is in place for the operation.