About tallness and distance

From an interview with the flight controller of Severny Airport Pavel Pluskin published on April 10, 2010: (Polish origin | Russian source) Question: - "So you had no information about their height?" Controller: - "No, I didn't" From the transcript published by the Interstate Aviation Commission MAK: (https://kozidryngiel.files.wordpress.com/2010/06/stenogram.pdf) 10:39:30,1 CONTROL "8 Na course and path" 10:39:49,9 COUNTER "You are approaching further, on course […]