> You missed the point. The collision covered in this article occurred relatively close to port, not during an open ocean patrol. So you're saying the collisio

> You missed the point. The collision covered in this article occurred relatively close to port, not during an open ocean patrol. So you're saying the collision _didn't_ occur at a time when the sub was trying to stay hidden, you're saying that the operators could have / should have used active sonar? Is that it? Look, either the sub was trying to stay hidden at the time it accidentally collided with another submarine, or it wasn't trying to stay hidden. In either case it didn't do a good job. If it wasn't trying to stay hidden, then it shouldn't have collided. If it was trying to stay hidden, then its location was not as unpredictable as it should have been.