A Mark 48 needs more than a compatible torpedo tube

Could a U.S. Second World War submarine fire a Mark 48 torpedo, and what if it replaced the Mark 14 in 1942?

It might launch one after modification, but effective use would require a major fire-control upgrade to provide the modern torpedo's information needs.

A Second World War U.S. submarine might be altered to discharge a Mark 48, but its fire-control computer was built around the much simpler information demands of the Mark 14. Tube diameter alone does not provide the sensors, computation, interfaces, or guidance data needed for effective use. Without extensive fire-control work, the submarine could launch the weapon without being able to employ it effectively.