I have thought long on where the holes in the visor, and this is the final. I first thought it was a gun barrel, but it is not. The material thickness is about 6-8 mm in which holes are so it takes some strength to make the holes, scratches also get an explanation. 1. Here is the submarine on the way up.
2. It hits submarine visor, see the trophy.
3. The bow visor release of their strongholds, and lifted the U-boat's forces.
4. U-boat go on and the visor is going down.
5. Here, hit the visor of the u-boat-tower various tubes sticking up, make holes in the visor.
6. U-boat continues along the starboard side of the M / S Estonia.
7. Here beats the submarine stabilisatorfenan of the M / V Estonia starboard-side, the M / S Estonia begins to take in water. There is no other explanation for the dent in the visor, but above all the holes in the visor. We need large forces to make the dent in the visor. To make holes in the visor is needed is not as great powers, it is enough bow visor own weight in the case.

Once stabilisatorfenan turned off on the starboard side is a fact of the accident, the M / S Estonia begins to take in water. Had not stabilisatorfenan had been struck by the M / S Estonia probably fared.

The stabilizer fins sits in the middle of the ship, one on each side. If the door to the room stabilizer is open or has a bad lock (there will be high pressure at the door on the stabilizer room filled with water) and a stabilizer fin wears off, the ship begins to take water into the engine room. Is the water inlet is greater than the capacity of the bilge pump sinking inevitable.

Stabilizer Fins: They are good to have when it goes high waves and the rocks, get a stable process. But at the same time it is a dangerous design if they are improperly installed and running in no.

The bow visor: The holes are from the tubes sticking out of the submarine's tower. There is nothing else that could have caused the holes, the plate is about 6-8 millimeters here, it takes little effort to make holes.