A
topic from January...maybe it helps.
And while on the subject: if you have a radar installed, and load a game...remember that the radar is switched on by default upon loading, so you have to shut it down yourself!
If you're in dangerous waters, then shut if down immeadiatly, if you want to stay undetected!
It's the 1st thing I do when I enter the game...if you forget about it, then a few minutes of radar-activity is enough to get the enemy alerted.