More than 1500 people died when the ship sank on April 15, 1912.
Patten said the crash happened because a crew member steered right when he should have steered left.
The Titanic was built at a time when the world was converting from sail to steam ships, which used two different steering systems, Patten said.
Some of the Titanic’s crew were used to using the old Tiller Orders, where you steer right to go left and left to go right.
Others were more familiar with the modern Rudder Orders, where you steer the way you want to go.
In a moment of panic, the steersman used the wrong orders and turned toward the iceberg. The ship had four minutes to change course but by that time it was too late.