How did Britannic lay on its side?

The Britannic, a sister ship to the Titanic, sank on November 21, 1916, after hitting a mine in the Aegean Sea. Following the explosion, the ship listed heavily to one side due to the flooding of its compartments. As it took on water, the weight imbalance caused by the flooding ultimately led to the vessel rolling over and coming to rest on its side on the seabed. The ship now lies in about 400 feet of water, partially upright but with a significant tilt.