A long-range torpedo must defeat the whole ASW screen

Would a modern long-range torpedo simply break the battleship's back from 30 miles away?

It could be lethal, but it would first have to penetrate a layered ASW screen and survive detection and countermeasures; a reliable attack would likely require a spread rather than one effortless shot.

A hostile submarine would face more than the central battleship when trying to obtain a favorable shot. A supporting submarine, ASW helicopters, rotary uncrewed aircraft, and sonobuoys would all complicate its approach. The example places six uncrewed towed-array vessels roughly 10 to 15 miles from the hull. Their sensor data would be combined to help detect an incoming weapon. An attacker seeking a hit from 30 miles away would probably fire multiple torpedoes, which would still face detection and decoys. A hit remains possible, but a single effortless shot is a poor model of the engagement.