One thing we do not have to fight in DW, is the sound bending across bearings, depending on frequency. IOW, if you cannot assign a tracker to S1:60 and another to S1:125, that is an artificial limitation.
When I come across such, I usually do not spend too much time trying to get sonar classifications - just sending torpedoes into the formation usually wreaks havoc anyway. (I usually try to determine that they are the hostiles I'm hunting for, but that's usually not that hard.)
Occasionally I've sunk more ships than I've spent torpedoes.
