No aircraft were spotted, and a later investigation suggested it had been the result of enemy jamming.

But I need to report that enemy jamming is increasing.

He'd need to slow down and come shallow to answer, using frequencies impaired now by enemy jamming.

As with all radio communications it was also prone to enemy jamming.

Nevertheless, it was very welcome until its worth was diminished by enemy jamming.

"Information limited due to enemy jamming, but the mother ships appear to be closing on the remaining shuttle."

Without the proper electronic passwords, the computers which switched and operated the system would assume he was enemy jamming and block him out.

Combat frequencies were changed frequently as a matter of course to avoid enemy jamming or eavesdropping.

It is said to have a laser guidance resistant to enemy jamming.

This high resolution radar was able to distinguish targets even against enemy jamming and high background clutter from the ground.