a. RTOS01.1 ANSPs employing optical systems shall specify System Performance Requirements including Detection and Range Recognition Range Performance, Video latency, Video Update Rate, Video Failure Detection time, Point Tilt Zoom (PTZ) Function Control Latency, PTZ Function Movement Speed, and Time Synchronisation.
b. RTOS01.2 EUROCAE Document ED-240 'Minimum Aviation System Performance Specification for Remote Tower Optical Systems' provides guidance in developing these requirements and in verifying compliance.
c. RTOS01.3 ANSPs should consider Point and Zoom (PTZ) functionality using guidance from Reference A.
d. RTOS01.4 The visual presentation screens together with aerodrome ambient sound reproduction (if used) should be recorded. Where surveillance information is overlaid and/or integrated (in 'enhanced equipage') the recording of the screens will be a requirement.
e. Detailed requirements for recording and replay will be included in RTOS and will be largely similar to those for At-The-Glass Surveillance data described in SUR10