Halfway house map contact updates mod?

[Limey]

Hi again, more basic questions I'm afraid.

I've searched the forums but I can't find an answer for SHIV, though there was one for III. Is there a mod for the stock game which changes the behaviour of the nav map contact update feature so that it's less helpful, but doesn't generate as high a workload as turning it off completely? The sort of thing I'm looking for would replace the pinpoint accurate blue sonar bearing lines (which terminate at the exact range of the contact) with lines of fixed lengths for contacts at long, medium and short ranges. It would also leave off the course tails from visual contacts and perhaps also not plot their range so accurately. In my view this simulates having a competent but not omniscient crew working for you.

At the moment the workload of tracking a convoy and it's circling escorts by sonar is crippling with map contacts off, but turning it on makes it slightly too easy.

If this is in TMO please forgive the question. I found it quite hard to find out what's different between stock and TMO but if this is one of the things it does then I'll put it on once my copy of 1.5 arrives.

Thanks!