Reformed Offlian
Master Poster
You misunderstand. It was (as far as I can make out) supposedly a Swedish sub that did the damage by mistake while it was shadowing the ferry.
A Swedish sub commanded by a rouge ex-KGB agent, who apparently warned some Estonian crewmembers about the mistake he was about to make for reasons. Somebody seeing military trucks at a seaport is a key observation that makes sense of all this.