The ship was ruptured on its starboard side. That is why it listed violently to the starboard side. The bow faces almost directly south, face down. The aft part of the vessel lies on the slope, with the starboard side to the east of it, on the upper side, and the aft port side on the lower slope. The forward part of the ship is on soft mud, as is most of the port side.
The fact the vessel landed on a slope is pure coincidence. The ship sank stern first, with a 40° list to aft starboard. Then it capsized onto starboard so that the port side was horizontal and passengers were able scramble along it for a short period. It then turned face forward with the bow rising virtually 90° upright out of the water, as the stern hit the bottom - the 155 metres length of the vessel in about 64 - 80 metres of water - thus, when it fell face forward, due to gravity, the stress would have been amidships - exactly or near the centre, hence the sensation surivivors have in such a sinking ship of it snapping in half, even if it does not actually do so. It fell on its stern, not on its starboard side, which, although nearer to the higher part of the slope, did not actually land on it, except to come to rest.
If there was a stress fracture, it will be seen roughly 75 -80 metres along, across the hull. But the hull looks perfectly smooth and intact, so the vessel appears to have landed relatively gently onto the seabed, after the initial bump on the stern.
LondonJohn's belief the Estonia was, 'just like The Herald of Free Enterprise and fated to land in the sea bed on its side', is unwarranted, unfounded and demonstrates an ignorance of how the Estonia actually sank.