Another 20 yr retired submariner here..
That's a good question, and while I was not a Sonar Tech, Fire Control or an Officer, yea there are many things a sub can/does do!
I was a Chief of the Watch (which is in control of almost the entire Sub unerway) and let me tell you that was the coolest thing I ever did.. Was working on becoming a Diving Officer but well..I retired lol
Now obviously I cannot say yes a fictional #1 is true or #3 is false because even being retired, there are things I cannot say
Sub crews do spend a lot of time practicing evasion tactics, and more specifically I mean the ships control party (OOD, helmsman/planesman, COW, DOOW) Sonar and Quartermaster as well.
Playing DW right now and man this stuff brings back memories!