Archaeologists have found what they believe to be the world’s oldest intact shipwreck at the bottom of the Black Sea where it appears to have lain undisturbed for more than 2,400 years.

The 23-metre (75ft) vessel, thought to be ancient Greek, was discovered with its mast, rudders and rowing benches all present and correct just over a mile below the surface. A lack of oxygen at that depth preserved it, the researchers said.

“A ship surviving intact from the classical world, lying in over 2km of water, is something I would never have believed possible,” said Professor Jon Adams, the principal investigator with the Black Sea Maritime Archaeology Project (MAP), the team that made the find. “This will change our understanding of shipbuilding and seafaring in the ancient world.”