What signal is detected as originating from an AIS SART and how is the signal displayed?

An AIS SART signal is shown on any AIS receiver as a special MMSI-like coded symbol.

The 3-cm radar reflections are converted to AIS signals and displayed on ECDIS/ARPA screens.

An AIS SART transmits on AIS frequencies and the signals are converted to 3-cm radar targets for display on 3-cm radars.