Well, not exactly "track" like modern subs do. Tracking as I understand it means that it continuously updates the theoretical position of the enemy with the data it is constantly receiving automatically (No need for crew input except initially assigning the target to an automated "tracker", which will follow it) from sensors like sonar or radar. The WW2 US TDC did not "track" the target in that it did not continuously received updated data -It was manually entered by the crew-, it simply simulated based on the last data entered what the target would be doing if nothing else had changed (Speed/course). You possibly had already understood it, but I just wanted to be more precise, in case it was of interest for you when comparing with modern subs
