6.2.2 Dependencies and interfaces

In the case of ATS provision to several aerodromes from one RTC, the safety assessment should additionally cover interdependency aspects between the different aerodromes/ATS units. The recommendations in Sections 5.10 and 6.5.2 and Chapters 8 and 9 should also be considered. The implementation of remote aerodrome ATS is a change to the functional system that may impact one or several entities, persons or organisations (e.g. communication navigation surveillance (CNS) providers, adjacent ATS providers). Those entities, persons or organisations affected by the introduction of the remote tower concept would be, at least, the aerodrome operator(s) and the airspace users. In accordance with Regulation (EU) 2017/373, ATS.OR.205 and ATM/ANS.OR.A.045 (and associated AMC1 ATM/ANS.OR.A.045(a)(3), GM1 ATM/ANS.OR.A.045(a)(3), AMC1 ATM/ANS.OR.A.045(e), GM1 to GM4 ATM/ANS.OR.A.045(e), GM1 ATM/ANS.OR.A.045(e)(2) and GM1 ATM/ANS.OR.A.045(f)), an ATS provider is required to address dependencies, interfaces and interactions with such entities, persons or organisations when conducting the safety assessment. The way in which the technical systems of a remote tower implementation will interact may be different from that of a conventional tower. For example, as discussed in Chapters 3 and 4, technical systems may be located at different distant geographical locations (such as at the aerodrome and at the remote location/facility), interacting with each other as well as with external entities on both sides. Such an interaction would require consideration during the safety assessment.