Subnucleonic beam
The subnucleonic beam was a type of active scan used by Hirogen ships 

The Hirogen had the ability to intentionally create a type of subnucleonic beam capable of disrupting an enemy ship's warp engines, communications systems, weapons, and its navigational sensors. Once a target ship was disabled, the Hirogen used their tractor beam technology to draw in their prey.

In 2374, the Class 2 shuttle  was hit by a subnucleonic beam and hunted down by a Hirogen ship. ()

Sensor technology