replacement. The new displays will have to be able to show the same number of
runways that the current ones do and may have to ability to expand based on newer
display technology. One of the considerations is the use of other displays systems such
as ACE - IDS, I - DSR, and E - IDS in the future. Currently facili ties with alternate displays
still have to have an RBDT in the tower in case of a failure of the alternate display
system. This policy may have to be readdressed as part of a replacement for the RBDT s.
