Bow of the ship with the paravane attachment points. This was used to clear mines by a towed device.
If you look closely you will see a bunch of 3 digit numbers all over the surface. These are places where they measured the hull thickness, to thousandths of an inch. This is what helped determined which areas needed to be replaced. They have left a lot of areas in their original, riveted configuration. Welding did not become widely used in shipbuilding until decades later. Of course, all the new plate is welded on. Because of lost skills, a lot of work done in the 1980s dry-docking caused issues. They found leaking rivets, instead of finding craftsmen that knew how to repair them, they ring welded them. This caused the rivets nearby to then loosen due to the heat. So the problems then grew and grew as they went, they eventually ring welded thousands of rivets. Could have repaired the leaky ones with some simple procedures had they known how.