St Nazaire as a torpedo-like attack on shore infrastructure

What damage could torpedoes do to shore installations such as dry docks and coastal batteries, and has one ever been knocked out that way?

No conventional example is established here; the panel instead cites St Nazaire, where the attacking ship functioned as a giant torpedo against a dock installation.

The panel does not identify a conventional naval torpedo that knocked out a shore battery or dry dock. Instead it points to the raid on St Nazaire and describes the attacking ship as a very large torpedo used against fixed infrastructure. That analogy demonstrates the destructive idea while leaving the narrower question about ordinary torpedo employment unresolved. The exchange then turns to the continuing significance of the Campbeltown name and its associations with attacking coastal objectives.