How fixed underwater torpedo tubes were aimed

How were underwater torpedo tubes aimed on capital ships?

The tube fired on a fixed line, while the torpedo-control team programmed the weapon to turn onto the required course after launch.

The tube itself did not train toward the target like a deck launcher. A torpedo left on the tube's fixed bearing, but settings entered before launch could command a turn after it entered the water. A dedicated torpedo officer and control team calculated that solution as part of the ship's wider fire-control organization. Even a mechanically fixed weapon depended on specialized personnel and pre-launch guidance.