There is only one way that this damage has occurred in, not more. Everything has to follow a program, millisecond for millisecond. This type is common automotive sheet, the difference is that it is 10 times thicker, 8-10 millimeters thick. You could almost draw a comparison with the flat bar on a railing in a stairwell or flat bar at the top of the railing on an iron balcony. A typical U-boat has a hull thickness of 30 mm and thicker.

It looks like a skewer been driven into the ground, and then wiggle the skewer. As I see the damage on the bow visor now: It is made by an object with straight edges fixed at different angles.
The object have hit the bow visor of the line A-B or even A-C, an mark that may be, 5.5 meters to about 7.5 meters.
The object have moved in the motion D first and then E, and left the bow visor in line F.
Great energy, how much I do not know yet. Thanks to the great self-importance on the MV Estonia and the subject she have collided the bow visor have been pushed to the right a few degrees at the bottom (thanks to its wedge-shaped appearance) as arrow G shows.
The force has been so great that the subject also have lift up the bow visor, arrow H, locking devices have been scratching away.