The issue is whether the torpedo could find the pipeline once it was in the water.
There are simpler and more effective ways to damage the pipeline than using an aircraft to deliver a torpedo.
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
Exactly. I'm still going with divers and shaped charges. They come in and leave on a submarine, undetectable. We trained to blow bridges this way.