On this day, April 15, 1912, the Titanic sank. As we remember the anniversary of this tragedy, we take ourselves inside the Titanic with these sonar images. 

How does the wreckage of the Titanic look now on the anniversary of its sinking? We've seen the images of the Titanic but these sonar images of the Titanic show it to us in its grave on the ocean floor.

New sonar images show the sunken Titanic 12,500 feet below sea level. The April edition of National Geographic Magazine in 2012 featured these images for the first time to honor the centenary of the tragic ship’s sinking.

A sonar image of the Titanic.

A sonar image of the Titanic.

Previously, images of this nature, taken far under the Atlantic Ocean’s surface, were dark and dim but these images reveal the full extent of the wreckage. They also show the five by three-mile field of debris surrounding the wreck as well as the staircases at the stern of the boat.

The surrounding area on the seabed is also pitted with craters, from boulders from the iceberg sinking to the ocean floor.

Read more: Real story of heartbreaking Irish mother and children from Titanic movie

The Titanic wreckage.

The Titanic wreckage.

These images, created by the Woods Hole Oceanographic Institution (WHOI), in Massachusetts, took months to create.

Bill Lange of WHOI said "Now we know where everything is. After a hundred years, the lights are finally on."

The project sent three robots down to the Titanic. They moved along the length of the ship and captured thousands of images with optical cameras and sonar devices.

James Selgado, the expedition’s chief scientist, said, “This is a game-changer. In the past, trying to understand Titanic was like trying to understand Manhattan at midnight in a rainstorm, with a flashlight.

Read more: Historic Titanic pier at Cobh to be reconstructed

A computer-generated image of the Titanic wreckage.

A computer-generated image of the Titanic wreckage.

“Now we have a site that can be understood and measured, with definite things to tell us. In years to come, this historic map may give voice to those people who were silenced, seemingly forever, when the cold water closed over them.”

On April 15, 1912, the Titanic sunk. More than 1,500 people died in the tragedy.

You can read more about the Irish connection with the Titanic here. 

* Originally published in 2012. 

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Images of the Titanic's bow as composed by the Woods Hole Oceanographic Institution (WHOI)Woods Hole Oceanographic Institution (WHOI)