Destroyer crews improvising attacks on bridges

Could destroyer crews use torpedoes or other improvised methods to destroy bridges?

Yes; British crews explored torpedoes, shells, and swimmer-placed depth charges, with mixed results.

British destroyer crews had no single standard bridge-demolition technique. They considered torpedoes and gunfire, and some of their improvised methods were employed during the Second World War with mixed results. One striking proposal used volunteer swimmers rather than trained divers to place depth charges against bridge supports and detonate them remotely by cable. The experiments could produce unpredictable effects because the planners focused on achieving demolition and showed little concern that the explosive charge might be far larger than necessary.