According to the Warbolts Telegram channel, Russia issued a NOTAM notice that closed areas in the Barents Sea and Laptev Sea from 15 to 17 November 2021. These closures are normally associated with tests of the Nudol ASAT system from the Plesetsk test site.

This is the third notice issued in 2021. Previous ones closed these areas on 29 May 2021 and on 23-24 June 2021. Those tests were probably postponed since the United States did not issue any statement similar to the one that followed tests in December 2020 and in April 2020.