I suspect it was the inadvertent firing of the torpedo that got their attention
I'd often wondered about pointing my stern at an escort, but I figured it counted as presenting my smallest profile. One thing about spending more time on here is that I'm starting to comprehend the vastness of my ignorance.
The silent running issue started before I took damage, and it's happened before - I suspect it's a similar thing to the CO2 bug that hits you when surfaced. I should have saved and reloaded the game and seen if that worked, but I didn't. I wasn't sure if I was in SR with no icon showing - I guess I know now......
I'm pretty happy at the sonar station, but I tend to only go there when I need to get a really precise bearing when I'm doing TMA pre-radar, or to get to know the target a bit better. I'm no expert, but I'm getting better at recognising sound signatures - I can tell a patrolling escort from a charging one, but to be honest, it's as easy to call for a sonar report for something like that. Any radical departure from what he's been doing is likely to be due to my presence, and for all my ineptitude at the controls, I'm pretty situationally aware. It's my tactics that suck
Like many people on here I've done time in the military, and what I love about this game is solving tactical problems. Trouble is I was an Infantryman and it's becoming very apparent that I need to stop thinking like one to make this game work for me

The method I'd evolved to intercept targets worked, but after reading Lurker's radar intercept tutorial for MOBO, it was like trading in a longbow for a sniper rifle - That's what made this so funny - in an infuriating way. It was the best approach I've done so far - the only thing that could have ruined it was something spectacularly stupid on my part, and sure enough......
I would have got tired of the stock game in pretty short order, so it completely blows me away that people have put so much of themselves into making it what it is - That's a topic for a different post though