A degaussing system gives the vessels extremely low electromagnetic signature.

The electromagnetic signature emitted by all of the radar installations within range of the incident was somehow different.

The Americans were compulsive about collecting intell photos and new electromagnetic signatures for their threat libraries.

However, the ground conductivity measurements showed an anomaly in the electromagnetic signature that it was thought might be caused by metal artifacts buried with the head.

I recognized it from its electromagnetic signature: contrary to myth, Ghosts aren't all alike, at least not to another Ghost.

The zone lacks gravity anomalies or electromagnetic signatures which would allow scientists to conclude that it was generated by subduction.

Beginning in 2010, new submarines of this class will include a software system that can monitor and reduce their electromagnetic signatures when needed.

All known methods of disintegration leave certain particle traces and electromagnetic signatures.

"The electromagnetic signature, in certain bandwidths is the same as from a nuclear detonation."

Similarly, such films could allow military aircraft to shield their electromagnetic "signatures", which can be detected via radar.