"The Air Horn" is a Russian military commandment network serving the Western Military District. It transmits on 3510 kHz around the clock. So far, apart from test counts and other technical tests, it has not been heard with any actual traffic.

The Air Horn began operation on February 3, 2017, initially on 4020 kHz. From May 24 to July 5, 2019, the station transmitted on 4070 kHz instead. Since October 1, 2019, the station transmits on 3510 kHz; it was also briefly active on this frequency on September 25, 2019.

On December 11, 2019, the channel marker suffered a breakdown - experiencing repeated malfunctions throughout that day - and remained off air until January 16, 2020.