"The aircraft were introduced into service in a ceremony held on August 1."
According to the statement, the navy flankers had been employed in defense of Northern Fleet warship units on long campaigns. From now on, in between campaigns, the Su-33 aircraft will be employed in the air defense of the Kola area of the Russian Arctic.
The aircraft are manufactured in Komsomolsk-on-Amur and first entered into official service in 1998.
A naval derivative of the land-based Su-27 fighter jet, it has a reinforced undercarriage and folding wings for landing on navy aircraft carriers, and is equipped with probe-and-drogue refueling capabilities.