Were torpedoes considered or used against bridges and dams?
Short answerYes. The Royal Navy used aerial torpedoes against fixed infrastructure and adapted shallow-water release techniques, a quicker compromise rather than a perfect replacement for the bouncing bomb.
NotesThe Royal Navy used torpedoes against bridges, dams, and other fixed targets, commonly delivering them from Swordfish aircraft. At shallow-water targets the crews used wire-assisted release methods like those developed for Taranto so the weapon entered at the right angle and did not bury itself in mud. This existing technique offered a different path from Barnes Wallis's clever but more specialized bouncing bomb. A Lancaster-carried torpedo adapted to detonate against or beneath the structure might have provided a quicker, roughly adequate solution if enough weapons could be launched.