In stock 1.04 DW only the OH Perry frigate and the Seawolf show the SNR (signal to noise ratio) of the sonar contact or bearing on which it receives. That basically means how loud it is to you now. It doesn't say how audible you are to others. It is the closest equivalent you'll get to those numbers in Cold Waters.
It mostly shows low numbers, often flipping between 0 an 1. So of little use really. The visual line in the waterfall is more telling of the loudness.
The DWX mod changes the interface so some other units also show that.
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