63 Whiskey is a NATO brevity code for the Russian Su-35 fighter aircraft. It is used by NATO forces to identify and refer to this aircraft in communications.
The Su-35 is a highly maneuverable and advanced fighter aircraft, and is considered to be one of the most capable aircraft in the Russian Air Force. It is equipped with a variety of weapons, including air-to-air missiles, air-to-ground missiles, and bombs.