Patchman, do you mean this?
If so, that's the 3000 yard/meter bearing plotter, not the 1500 yard bearing plotter in the stock game. It does nothing to show where your sub is, it only projects a bearing plotter around the sub so you can plot the bearing of sighted objects, or your projected torpedo path. It says nothing about where you are to GPS certainty at all. Taking it away will not solve the problem of how accurately targets are plotted.
You can get rid of the velocity vectors, ship silhouettes, friend/foe/neutral colors, text ID, course and speed with TMO or TMOplot. Then all you are left with to object to is the perfect positioning of visual targets. If you have radar, that objection is gone because you would know those positions as accurately as our nav map shows them anyway.
So I understand what you want, but getting rid of the bearing plotter has nothing to do with it. Repainting the head would help just as much.