The radar offers a passive detection and tracking capability against jammers.
2.
ESM is the passive detection of enemy electromagnetic ( EM ) emissions.
3.
The ship has an electronics warfare suite that provides passive detection and decoy countermeasures.
4.
Passive detection is almost impossible and surface units are forced to use active sonar to search.
5.
A submarine usually relies on passive detection, not risking active sonar or a periscope observation.
6.
These ships must be multi-role, but there is usually an emphasis on ASW, especially passive detection.
7.
So our actual passive detection capabilities of city lights are presently limited to the few earth like planets within a few dozen light years.
8.
Because of the quietening of submarines, resulting in shorter passive detection ranges, there has been interest in low frequency active for ocean surveillance.
9.
Between 1949 and 1960, it provided tactical control systems, including aircraft control and warning facilities, passive detection devices and guidance units in central Europe.
10.
The active system component, LFA, is an adjunct to the passive detection system, SURTASS, and is planned for use when passive system performance proves inadequate.
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