To compensate for weird identification possibility - especially at night - you can use a special mod for TWOS,
TWoS UI cmd_Radio Reports_Auto Target ID
Of course it takes away some realism because this AutoTarget feature is perfect, but as I said it's to compensate for the sim limitation, so use it sparingly
But realism at some point goes overboard anyway, e.g your watch crew have magic eyes through the fog or over long distances to report you convoy smoke etc. , so the realism discussion is vain at some point.