1. The EA-3B variant was modified for electronic intelligence against the Warsaw Pact.

2. The last Tu-22 subtype was the Tu-22P ('Blinder-E') electronic warfare version, initially used for ELINT electronic intelligence gathering.

3. Three B-57s were lost in action (only one as a result of enemy action), along with one RB-57F electronic intelligence aircraft.

4. A versatile design, the Tu-16 was built in numerous specialized variants for reconnaissance, maritime surveillance, electronic intelligence gathering (ELINT), and electronic warfare (ECM).

5. The ship was observed collecting electronic intelligence (ELINT) off the coast of Japan during February 2000, shortly before several PLA Navy warships conducted an exercise in the East China Sea area.