Originally Posted by
Hartington
Do "the authorities" know that a lot of western made Russian aircraft are registered outside Russia?
Yes. Hence, for example, the UK NOTAM;
...NO AIRCRAFT WHICH IS OWNED, CHARTERED OR OPERATED BY A
PERSON CONNECTED WITH RUSSIA, OR WHICH IS REGISTERED IN RUSSIA SHALL
FLY IN UNITED KINGDOM AIRSPACE, INCLUDING IN THE AIRSPACE ABOVE THE
UNITED KINGDOM'S TERRITORIAL SEA...
Other countries have similar formulations in their NOTAMs.