If he needs their height why don't he request it? As detailed
in my earlier post, his silence was for a full 13.5 seconds, until the plane "in his view"
has already crashed (!) Not excusable with such arguments. He let it drop from 150m to 5m, without saying a word...
This can impossibly be according to procedure? There may be a number of reasons why he doesn't get a readback. Can be malfunction on communication equipment, or any number of trouble with the aircraft that make them too busy to respond. If anything it should bring him to a higher than normal level of alert. The opposite seems to have happened.