Не се споменава,колко време,са ги държали в зона за изчакване и дали АТС са процедирали адекватно при разчитането на вторичната информация от радарната картина ?!?
ATC Services
Mode S data link can serve as a back up to
many ATC services that are provided today
by VHF ‘voice communications’. This data
link back up will improve system safety
by reducing communications-related errors
within the ATC system. Many types of
messages are potential candidates for
data link back up and other ATC services.
These include:
• Flight identification, altitude
clearance confirmation
• Take-off clearance confirmation
• New communication frequency for
sector hand-over
• Pilot acknowledgement of ATC clearance
• Transmission to the ground of aircraft
flight parameters, and
• Minimum safe altitude warning.