Isn't the TMA a little too perfect?

[shipkiller1]

Originally Posted by MBot

I am not sure why you think this is wrong. This statement sounds absolutely correct to me.

Because in the real world of passive TMA (without any range data) you cannot determine the course, range and speed of a contact without (driving) changing the bearing rate.

TMA is a geometry problem. You can find the third leg of a triangle if you know the other two legs. In passive TMA, you are starting out with only one leg of the triangle.