Harpoon did not fire
I understand that a Greenpeace boat got in the way...
It was probably a German made harpoon too, not Japanese or Norwegian
What the reporter states doesn't make sense.
... Saying it failed because they were going slower than the normal deployment speed just doesn't make sense.
I was first thinking along the same line also but the air density at 15km is much higher than at 100km. Even so I was under the impression that the feather is deployed at a slower speed near the apex of the flight.