EUROCAE ED-313 PDF

PURPOSE AND SCOPE

The purpose of this Operational Services and Environment Definition (OSED) is to provide a basis for assessing and establishing operational, safety, performance, and interoperability requirements for the Detect And Avoid (DAA) [Traffic] system with its Remain Well Clear (RWC) and Collision Avoidance (CA) functions, for a Remotely Piloted Aircraft System (RPAS) operating as IFR traffic in airspace classes A-G in European Union Aviation Safety Agency (EASA) certified categories: Certified and Specific Medium / High Risk (High Air Risk in SAIL III or greater).

The introduction of RPAS into a mix of Visual Flight Rules (VFR) and Instrument Flight Rules (IFR) traffic in different airspace classes introduces the need for a DAA capability to allow for full integration of a system allowing the Remote Pilot (RP) to comply with the Rules of the Air of the airspace class and operational environment in which the RPAS will be flying. The objective of the DAA system is to enable operations with RPAS that are at least as safe as operations of aircraft with a pilot on board with respect to avoiding conflicting traffic.

In International Civil Aviation Organization (ICAO) Annex 2 [Ref 1], DAA is defined as the capability to see, sense or detect conflicting traffic or other hazards and take appropriate action. Thus, the DAA system described in this OSED aims to ensure the safe execution of a Remotely Piloted Aircraft (RPA) flight in the presence of conflicting traffic so as not to operate in such proximity to another aircraft as to create a collision hazard. This includes the capability to provide alerting and guidance to support RP decision making. It applies in all classes of airspace, including when under Air Traffic Control (ATC) clearance.

The OSED therefore establishes the operational requirements that will be placed on a DAA system to facilitate safe integration and maintain interoperability with existing systems. It describes three main functions within the DAA system, namely Traffic Awareness (TrAw), Remain Well Clear (RWC) and Collision Avoidance (CA). The use of the DAA system and its associated functions is subject to the operational environment assumptions detailed herein.

This OSED is limited to the subset of ICAO DAA functions related to avoidance of conflicting traffic by RPAS, see [Ref 2] section 10. Specifically, the OSED addresses:

- The separation provision phase, [Ref 2] page 10-3, which states: “Separation provision by ATC as well as "remain-well-clear (RWC)" by pilots/RPs”, and

- The CA phase in which, “last resort actions or manoeuvres are executed to resolve conflicts if the strategic or tactical [separation] phases did not prevent the hazard from being encountered’’.

The intended audience are future users and personnel whose work will be affected by the introduction of DAA. This includes RPs, RPAS System Developers, pilots of all classes of aircraft, Air Navigation Service Providers (ANSPs), Air Traffic Controllers (ATCo), Civil Aviation Authorities (CAA), Regulatory Authorities, Aircraft Operators, Aircraft Manufacturers, Avionics Manufacturers, Military Authorities and Military Aircraft Operators.