It is a kind of ship called a fluyt and it was the cornerstone of a trade-built empire that saw the Dutch becoming a global superpower. The fluyt was so important in that it could transport with minimum crew loads of freight around the world.
Divers have made a curious discovery of a ship lodged at the bottom of the ocean, 400 years old.
The ship, which belongs to the Dutch empire covering five continents, is in such a nice reputation that no-one is entirely aware of how it came to be at the bottom of the ocean.
It is a type of ship called a fluyt and it was the cornerstone of a trade-built empire that saw the Dutch becoming a global superpower.
The fluyt was so important in that it could transport with minimum crew loads of freight around the world.
Despite being common back in the olden days, however, there are very few left today, including those that were sunk at the bottom of the sea.
That's why this one is so, so weird and significant.
So, the wonder is that even after 400 years down in the Baltic Sea, it's in the near-perfect nick.
Jouni Polkko from Badewanne, the dive team that discovered the submarine, explained: "There's no idea [how it sank] about that.
"The hull is intact. It's in the middle of the sea, so it didn't run aground."
"Maybe it capsized in a storm, or the pumps were stuck and the ship got too much water in because of a leak.
"Or maybe the rigging was frozen and made the ship unstable. But we really don't know."
The ship's condition is so strong that just a little amount of damage happens, and even that is believed to have been caused over the years by trawler netting.
That indicates when it got down the ship was in excellent shape.
The ship's hold is still completed, but the Finnish diving team hasn't been able to determine what's in there because the vessel is filled with so much silt.
Juha Flinkman, also from the diving unit, said a 'big surprise' was the finding.
He added: "This fluyt family of ships were fundamental in the rise of the Dutch Republic into the economic superpower it was.
"In their time, they were very efficient vessels.
"And one has to remember that it was this type of ship that practically all Dutch explorers used - like Willem Barents in the Arctic, and those who went to Australia and Asia."
It is often believed that the conditions across the Gulf of Finland played a part in saving the boats.
Polkko continued: "It is only in rare places around the world, including the Baltic Sea, where wooden wrecks can survive for centuries without being destroyed.
"Due to low salinity, absolute darkness, and very low temperatures all year round, these processes are very slow in the Baltic.
"Perhaps most importantly, wood-boring organisms such as shipworm cannot live in such environments.
"Even in temperate seas, all wooden wrecks vanish in decades, unless buried in sediments."
He added: "All of the Baltic Sea is good for preserving old shipwrecks.
"But towards the Gulf of Finland conditions just improve as the salinity decreases.
"Also, the sea is frozen in the winter, so ice cover stabilises conditions even further."
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