A blow to the bottom, an object or a submarine? 26 years after Estonia sank, new information about a hole in the hull has emerged. But what really caused the hole is still unclear and the theories are many. - I believe more that something happened when the ship hit the bottom, says Olle Rutgersson, professor emeritus in ship technology.
It was on September 28, 1994 that the passenger ferry Estonia sank.
Of the 989 passengers on board, 137 people survived.
Now there is new information that there is a large hole in Estonia's hull.
But what really caused the hole?
Hear the theories in the clip above.