Again, look at the big picture.
ESM helps identify the platform on a given bearing.
Radar gives you an exact location but also gives away your presence.
Merging the bow sonar with the towed array "can" give you a location/range based on triangulation, assuming the towed array is straight.
If I can locate a contact within +/- 5K yards, that's enough for a shooting solution. As far as merging contacts, if you're certain they are all the same contact, go ahead and merge them. If your solution on a merged contact starts to go haywire, it means part(s) of that solution are wrong.
Ideally, you
want a solution to go wrong. That error gives you the info you need to correct it.
TMA is
not the same thing as bore sighting a contact in your fighter plane's radar.
TMA is an on-going process of calculating a contact's range, heading, and speed from minimal bearing data.
TMA
always happens in the past. All you're doing is guessing at a prediction of where the contact is going to be.