What radar unit displays corresponding radar information on a cathode ray tube (CRT)?

The radar unit that displays corresponding radar information on a cathode ray tube (CRT) is the indicator. An indicator serves as the visual output device for radar systems, rendering the information collected by the radar equipment in a format that can be easily read and interpreted by operators.

The CRT in an indicator illustrates the radar return signals, enabling users to see the positions of targets, their movements, and various other parameters of the radar display. The design of the CRT allows it to provide a dynamic and real-time representation of radar data, which is crucial for effective monitoring and decision-making.

The other options involve components or systems that, while related to radar technology, do not serve primarily as visual display units. Waveguides are structures that guide waves, including radar waves, from one point to another but do not display radar information. The Analog Control Multiplexer (ACM) is involved in the processing of signals rather than their visual representation. The Identification Friend or Foe/Selective Identification Features (IFF/SIF) system is used for distinguishing between friendly and hostile targets, but again, this is not inherently related to displaying radar information on a CRT.