The real scheme appears too elaborate to infer from the previously known details. If you see a plane and then things blow up you don't necessarily suspect a signaling buoy to trigger dropping from the plane.
The original point was that we had no weapons that would do the job, which had to be accomplished with demolition charges. Are you just objecting to the story because it throws aside your favorite fantasy?
The real scheme appears too elaborate to infer from the previously known details. If you see a plane and then things blow up you don't necessarily suspect a signaling buoy to trigger dropping from the plane.
The original point was that we had no weapons that would do the job, which had to be accomplished with demolition charges. Are you just objecting to the story because it throws aside your favorite fantasy?