How can rescue personnel detect that a SART is transmitting in the immediate vicinity?

A
The SART's blips on the PPI will begin arcing and eventually become concentric circles.
B
The DSC unit will react to the SART's signal and respond with the two-tone alarm.
C
The SART can provide an appproximate location to within a two nautical mile radius, per IMO standards.
D
The SART signal appears as a target which comes and goes; the effect of heavy swells on a SART.
E