Julien Evans
I am an ATCO, I work in the TMA.... so on metrification, what vertical separation do you suggest?
As you state, the London TMA is working at or above capacity for a portion of every day.... 500 metres vertical separation would give us less levels to play with than 1000'.
330 metres separation is too difficult to muck about with in an environment where we are already working very hard.
500' or 200M separation is not enought when we are talking about an environment where us ATCOs HAVE to use performance climbs etc to get the job done on a regular basis - it would trigger too many alarms - even if TCAS was reprogrammed worldwide.