An iceberg would end Bismarck's sortie before Denmark Strait

What if Bismarck hit an iceberg during her first mission and sank?

The likely point is before Denmark Strait, so Bismarck would never sink Hood and the subsequent Royal Navy pursuit would unfold very differently.

The counterfactual places the collision while Bismarck is closest to the northern ice, before the Battle of Denmark Strait. A loss there would prevent the engagement with Hood, so the famous Royal Navy pursuit would never begin in its historical form. The premise is playful, but Bismarck approached the ice on the outbound leg before meeting the British squadron. The scenario therefore removes the event that drove the hunt rather than merely changing its ending.