If it was a Swedish submarine that collided with the ship, as former State Prosecutor for Estonia, Margus Kurm, believes, then that tells you (a) the escort would have been arranged and known pf in advance and (b) the collision would be relayed to the defence forces pronto, and (c) the first to know would not be the coastguard, or the TT News Agency but... Commander Svensson who would surely have imparted the news pronto to who he reports to.
This reasoning doesn't make much sense.
It seems to me that your reasoning is the following:
(1) If Bildt knew about the disaster early, then this is evidence that he or his people were monitoring the ferry even before the disaster.
(2) If they were monitoring the ferry before the disaster, then there is more to the disaster than the official story.
So far so good, but you also claim that
(3) It is ridiculous to think that Bildt learned about the disaster from the media.
When asked why, you point out
(4) If the ferry was being escorted by a sub, then Bildt or his people would be monitoring it.
But we're not assuming that it was being escorted. Heck, if we believed that, then there would be no point to talk about whether or not Bildt learned about the disaster early. Just being escorted by a sub would be odd enough to cast doubt on the official story.
So your reason for claiming that Bildt didn't learn about the disaster from the media is roughly, "Let's assume that it was being escorted by a sub. Then of course he'd be following the details already."
It is a mighty twisted bit of, oh, let's call it reasoning.