[Some guy on the internet]

Originally Posted by razark

Yes, that's your own noise. It also means you won't ever detect anything behind you. If you get a destroyer circling you, you'll see that he disappears a for a short time when he is almost directly behind you.
The submariner term for this area behind you is the "baffles".

So , this means the enemy warships also cant detect me if I am coming from behind them?