ICAO'nun (IVAO değil, ICAO) ICAO Annex 10 üzerinde yaptığı 2018 yılı tarihli değişikliği ile radyo freyzyolojilerinde bazı değişiklikler yapılmıştır.

https://www.icao.int/safety/Documents/2018%20Annex%20Amendments.pdf
https://ssd.dhmi.gov.tr/Documents/Annex%2010%20Cilt%202%20de%C4%9Fi%C5%9Fiklik.pdf

Flight levels shall be transmitted by pronouncing each digit separately except for the case of flight levels in whole hundreds, which shall be transmitted by pronouncing the digit of the whole hundred followed by the word HUNDRED

Flight level   Transmitted as
FL 180   Flight level one eight zero
FL 200   Flight level two hundred

The altimeter setting shall be transmitted by pronouncing each digit separately except for the case of a setting of 1 000 hPa which shall be transmitted as ONE THOUSAND

Altimeter   Transmitted as
1010   One zero one zero
1000   One thousand
999   Nine nine nine

All numbers used in the transmission of transponder codes shall be transmitted by pronouncing each digit separately except that, when the transponder codes contain whole thousands only, the information shall be transmitted by pronouncing the digit in the number of thousands followed by the word THOUSAND.

Transponder code   Transmitted as
2400   TWO FOUR ZERO ZERO
1000   ONE THOUSAND
2000   TWO THOUSAND
7001   SEVEN ZERO ZERO ONE

When providing information regarding relative bearing to an object or to conflicting traffic in terms of the 12-hour clock, the information shall be given pronouncing the double digits as TEN, ELEVEN, or TWELVE [O’CLOCK].

Bilgilendirme için teşekkürler.