5.2.7.2 Binocular-functionality-related functional requirements

The binocular functionality should be simple, quick, and easy to use, not considerably increasing the time needed to perform the same/similar tasks as when performed with manually operated binoculars in a conventional tower. As a recommended minimum, the binocular functionality should include a fixed optical magnification feature with a visual indication of the direction of bore sight, but may also include a moveable/adjustable optical zoom feature. In order to increase its usability, the binocular functionality may also include functionalities such as: predefined and user-definable positions (automatic functions including zoom, pan-and-tilt and focus) enabling the ATCO/AFISO to quickly jump to frequently recurring areas of interest (e.g. waypoints, thresholds, etc.); predefined and user-definable automatic scanning patterns, such as runway sweeps (including the option to pause or stop the scan to be able to check detected objects), supporting the ATCO/AFISO to perform tasks such as scanning the runway; automatic following of moving objects (e.g. aircraft, vehicles, personnel, animals), assisting the ATCO/AFISO to follow relevant moving objects of interest (commonly referred to as ‘PTZ tracking’); Note: Technical standards/recommendations related to binocular functionality automatic following of moving objects (termed ‘PTZ object following’ within ED-240A Change 1) are contained in EUROCAE ED-240A Change 1 [19]. optical sensor(s) from the non-visual spectrum, such as infrared. When the RTM comprises several separate roles/workstations (typically for larger aerodromes), the use of independent binocular functionalities and their independent presentation for each role/workstation should be considered (to avoid distraction amongst the ATCOs/AFISOs). In the case that more than one independent PTZ is available, operational, technical and human factors related to the assignment, transfer and locking of each PTZ should be assessed. If the binocular functionality is planned to be utilised as a mitigation means for (partial or full) loss of visual presentation, this added dependency should be accounted for when developing availability requirements on the binocular functionality. For recommended requirements on control latency and camera movement speed performances, refer to EUROCAE ED-240A Change 1 [19] (PTZ REQ 1 to 5)].