With today airport developments the airfields are bigger and bigger... do the ATC controllers have to have a clear line of sight to all airfield? Can someone point me out what are the minimum requirements for ATC tower visibility (good visibility operations).
There's a new FAA order on ATC siting for new towers with lines of sight angles, etc, but is it acceptable that some portions of taxiway/apron are not visible... at least the controller cannot see the pavement of those areas due to a building or so. What are the ICAO standards or other international requirements on this issues? Also if the controller can not see some portions of the airfield are there any standards on the use of CCTV cameras?