Definition of "electronic countermeasures" []

• Electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum (noun)

WordNet. Princeton University. 2010.

• "M.jor James M. Bartsch Electronic Warfare Trophy, for the B-52 unit compiling the most points in electronic countermeasures activity, went to the 319th Bomb Wing, Grand Forks AFB, North Dakota."
• "Bartsch Trophy, B-52 unit with most points in all electronic countermeasures activity, 410th Bomb Wing."
• "Meyer Trophy, top FB-111 unit compiling most points in low - level bombing and electronic countermeasures activity, terrain following, and low-time control, 509th Bomb Wing"