That was a pretty good documentary wasn't it? I already knew previous information about that fatal berg, but watching the program really showed how and where it formed.

It was so hard to see because during it's melting, it slowly turned turtle in the water, making it almost invisible. It was described by some as a "black berg" or "blue berg" because it blended in so much with the moonless night and dark sea. Added to this was the fact that the Atlantic Ocean in that area was very calm that night. Captain Smith commented to 2nd officer Lightoller that it was "like a mill pond" because it was so calm. To spot a iceberg at a distance you need the waves to break and foam around the base to outline it, and you didn't have that so it was even harder to spot out.