Question: The Gothebork sailed on a sea that drains through which islands?
Context: Götheborg is a sailing replica of an 18th-century Swedish East Indiaman and one of the world's largest operational wooden sailing vessels.  All sailors survived when the original ship sank off Gothenburg, Sweden, on 12September 1745, while approaching the harbour on her return from a third voyage to China.  Construction of the replica started in 1995, with the hull launched in 2003, and the rig fully tested for the first time in 2005.  Much of the time was spent researching how to rebuild the replica.  In 2008, "Götheborg" completed the first "Baltic Sea Tour". Thor Heyerdahl (] ; October 6, 1914 – April 18, 2002) was a Norwegian adventurer and ethnographer with a background in zoology, botany, and geography.  He became notable for his "Kon-Tiki" expedition in 1947, in which he sailed 8,000 km (5,000 mi) across the Pacific Ocean in a hand-built raft from South America to the Tuamotu Islands.  The expedition was designed to demonstrate that ancient people could have made long sea voyages, creating contacts between separate cultures.  This was linked to a diffusionist model of cultural development.  Heyerdahl subsequently made other voyages designed to demonstrate the possibility of contact between widely separated ancient people, notably the "Ra II" expedition of 1970, when he sailed from the west coast of Africa to Barbados in a papyrus reed boat.  He was appointed a government scholar in 1984. John Buyers was the first officer of the brig "Barwell" in 1799 on her voyage to China.  Later he was the first officer of the brig "Margaret" as an investment he and John Turnbull made in Turnbull and Co., John Turnbull being his second officer and a historian.  "Margaret", after some delay, left England on July 2, 1800, and sailing by way of the Cape of Good Hope, reached Sydney in February 1801.  They reached the Society Islands in September 1802.  After trading with various islands in the group, the ship sailed for the Hawaiian Islands, arriving at Oahu on December 17.  After trading for salt at Oahu, Kauai, Niihau, and Hawaiʻ i island, "Margaret" sailed south on January 21, 1803.  The ship sailed in among the Tuamotuan atolls and, on March 6, 1803, Nukutepipi, one of the Duke of Gloucester Islands, was visited and named Margaret Island, after the ship, though previously discovered in 1767.  On March 10, Makemo was discovered and named Phillips Island, after a late sheriff of London, Sir Richard Phillips.  On the same day, Taenga was discovered and named Holts Island.  Some other islands were sighted but they had been previously discovered and were not landed on.  Once in Tahiti, Turnbull set up an establishment ashore for buying pigs and salting them down with the salt obtained in the Hawaiian Islands. The Kon-Tiki2 Expedition built and sailed two balsawood rafts from Peru to Easter Island in 2015.  The goal of the expedition was to show that balsawood rafts can be sailed across long distances, and to collect scientific data in the southeast Pacific.  The expedition built two rafts in 30 days and went on to sail the rafts more than 2000 nautical miles before reaching Easter Island after 43 days at sea.  No other balsa rafts have sailed to Easter Island in modern times. The Baltic Sea is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, the Baltic countries, and the North and Central European Plain.  It includes the Gulf of Bothnia, the Bay of Bothnia, the Gulf of Finland, the Gulf of Riga, and the Bay of Gdańsk.  The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude.  A mediterranean sea of the Atlantic, with limited water exchange between the two bodies, the Baltic Sea drains through the Danish islands into the Kattegat by way of the straits of Øresund, the Great Belt, and the Little Belt. Picton Castle is a fully certified and registered Cook Islands tall ship whose mission is deep-ocean sail training and long distance education voyages.  "Picton Castle" is perhaps best known for her World Circumnavigations, though she has visited the Great Lakes twice, sailed numerous times on tours of the East Coast of the Americas, completed a Caribbean Voyage and in 2008 sailed to Europe, Africa and the Caribbean on a Voyage of the Atlantic.  In 2012 she sailed for the South Pacific.  "Picton Castle"'s unofficial home port in Canada is Lunenburg, Nova Scotia, but she is formally registered in the Cook Islands and subject to that country's regulatory regime. RMS "Carinthia was an ocean liner built in 1956 as one of the four "Saxonia" class ships.  She sailed for Cunard Line from her completion until 1968 when she was sold to Sitmar Line, rebuilt into a full-time cruise ship and renamed SS "Fairsea.  She sailed with Sitmar until 1988, when Sitmar was sold to P&O.  She was renamed SS "Fair Princess and sailed for Princess Cruises and P&O Cruises until 2000.  She was then sold to China Sea Cruises and renamed SS "China Sea Discovery.  In 2005 or 2006 she was scrapped in Alang, India. The Kattegat (] ; Swedish: "Kattegatt" , ] ) is a 30000 km2 sea area bounded by the Jutlandic peninsula in the west, the Danish straits islands of Denmark to the south and the provinces of Västergötland, Scania, Halland and Bohuslän in Sweden in the east.  The Baltic Sea drains into the Kattegat through the Danish Straits.  The sea area is a continuation of the Skagerrak and may be seen as a bay of the Baltic Sea or the North Sea or, as in traditional Scandinavian usage, neither of these. The Kura (Turkish: "Kura" ; Azerbaijani: "Kür" ; Georgian: მტკვარი, "Mt'k'vari" ; Armenian: Կուր, "Kur" ; Ancient Greek: Cyrus ; Persian: Kurosh‎ ‎ ) is an east-flowing river south of the Greater Caucasus Mountains which drains the southern slopes of the Greater Caucasus east into the Caspian Sea.  It also drains the north side of the Lesser Caucasus while its main tributary, the Aras drains the south side of those mountains.  Starting in northeastern Turkey, it flows through Turkey to Georgia, then to Azerbaijan, where it receives the Aras as a right tributary, and enters the Caspian Sea.  The total length of the river is 1515 km . Tinakula is a conical stratovolcano which forms an island north of Nendo in Temotu Province, the Solomon Islands.  It lies at the north end of the Santa Cruz Islands.  It is about 3.5 km wide and rises 851 m above sea level, rising 3 to from the sea floor.  It erupts approximately every hour in a plume of ash and rocks.  The volcano was first recorded in eruption in 1595 when Álvaro de Mendaña sailed past it.
Answer: Danish islands