Did the Swordfish belly-drop torpedo launch have disadvantages compared with conventional torpedo release?
Short answerThe aircraft had to fly straight and level for two or three seconds until the torpedo reached the water. The answer treats that exposure as acceptable for the period given the chance of a hit.
NotesThe belly-drop method required the Swordfish to fly straight and level for roughly two or three seconds until the torpedo dropped into the water. That brief period exposed the aircraft to defensive fire. Under the conditions discussed, the restriction was not judged a decisive disadvantage. The answer weighs that risk against the improved likelihood of hitting the target, without detailing the release geometry.