The researchers discovered what they believed to be the world's oldest intact shipwreck at the bottom of the Black Sea where it appeared to have lain undisturbed for more than 2,400 years. The vessel was 23 metres in length and was likely from ancient Greece. In the mast of the ship, researchers found rudders and rowing benches all present just over a mile below the surface. What enabled the ship to remain in such good condition was the lack of oxygen so deep in the sea, the researchers claimed at the time.