Kattegat in the context of "Gudenå"

The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain regions. It is the world's largest brackish water basin.

The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. It is a shelf sea and marginal sea of the Atlantic with limited water exchange between the two, making it an inland sea. The Baltic Sea drains through the Danish straits into the Kattegat by way of the Øresund, Great Belt and Little Belt. It includes the Gulf of Bothnia (divided into the Bothnian Bay and the Bothnian Sea), the Gulf of Finland, the Gulf of Riga and the Bay of Gdańsk.

The Skagerrak (/ˈskæɡəræk/; Danish: [ˈskɛːjɐˌʁɑk], Norwegian: [ˈskɑ̀ːɡərɑk], Swedish: [ˈskɑ̌ːɡɛrak]) is a strait running between the North Jutlandic Island of Denmark, the east coast of Norway and the west coast of Sweden, connecting the North Sea and the Kattegat sea.

The Skagerrak contains some of the busiest shipping routes in the world, with vessels from every corner of the globe. It also supports an intensive fishing industry. The ecosystem is strained and negatively affected by direct human activities. Oslo and Gothenburg are the only large cities in the Skagerrak region.

The table below lists the most recent statistics for over 100 ports of the Baltic Sea, including Kattegat strait, which handle notable freight or passenger traffic.

Container traffic is given in terms of Twenty-foot equivalent units of cargo. For ferries, transport vehicles like heavy trucks are included using their full weight, while passenger cars are not counted as cargo. Containers on trucks on ferries are not counted in containers column here.

Øresund or Öresund (UK: /ˌɜːrəˈsʊnd/, US: /ˈɜːrəsʌn, -sʊnd, ˈɔːrəsʊnd/; Danish: Øresund [ˈøːɐˌsɔnˀ]; Swedish: Öresund [œːrɛˈsɵnːd]), commonly known in English as the Sound, is a strait which forms the Danish–Swedish border, separating Zealand (Denmark) from Scania (Sweden). The strait has a length of 118 kilometres (73 mi); its width varies from 4 kilometres (2.5 mi) to 28 kilometres (17 mi). The narrowest point is between Helsingør in Denmark and Helsingborg in Sweden.

Øresund, along with the Great Belt, the Little Belt and the Kiel Canal, is one of four waterways that connect the Baltic Sea to the Atlantic Ocean via Kattegat, Skagerrak, and the North Sea; this makes it one of the busiest waterways in the world.

Gothenburg or Göteborg (Swedish: Göteborg [jœtɛˈbɔrj] ) is the second-largest city in Sweden, after the capital Stockholm, and the fifth-largest in the Nordic countries. Situated by the Kattegat on the west coast of Sweden, it is the gubernatorial seat of Västra Götaland County, with a population of approximately 600,000 in the city proper and about 1.1 million inhabitants in the metropolitan area.

King Gustavus Adolphus founded Gothenburg by royal charter in 1621 as a heavily fortified, primarily Dutch, trading colony. In addition to the generous privileges given to his Dutch allies during the ongoing Thirty Years' War, e.g. tax relaxation, he also attracted significant numbers of his German and Scottish allies to populate his only town on the western coast; this trading status was furthered by the founding of the Swedish East India Company. At a key strategic location at the mouth of the Göta älv, where Scandinavia's largest drainage basin enters the sea, the Port of Gothenburg is now the largest port in the Nordic countries. The presence of the University of Gothenburg and Chalmers University of Technology has led Gothenburg to become home to many students. Volvo was founded in Gothenburg in 1927, with both Volvo Cars, and its original parent Volvo Group (today makers of trucks, buses and marine engines) still headquartered on the island of Hisingen in the city. Other key companies in the area are AstraZeneca, Ericsson, and SKF.

The Danish straits are the straits connecting the Baltic Sea to the North Sea through the Kattegat and Skagerrak. Historically, the Danish straits were internal waterways of Denmark; however, following territorial losses, Øresund and Fehmarn Belt are now shared with Sweden and Germany, while the Great Belt and the Little Belt have remained Danish territorial waters. The Copenhagen Convention of 1857 made all the Danish straits open to commercial shipping. The straits have generally been regarded as an international waterway.

The Little Belt (Danish: Lillebælt, pronounced [ˈliləˌpelˀt]) is a strait between the island of Funen and the Jutland Peninsula in Denmark. It is one of the three Danish Straits that drain and connect the Baltic Sea to the Kattegat strait, which drains west to the North Sea and Atlantic Ocean.

Västergötland (Swedish: [ˈvɛ̂sːtɛrˌjøːtland] ), also known as West Gothland or the Latinized version Westrogothia in older literature, is one of the 25 traditional non-administrative provinces of Sweden (landskap in Swedish), situated in the southwest of Sweden.

Västergötland is home to Gothenburg, the second largest city in Sweden, which is situated along a short stretch of the Kattegat strait. The province is bordered by Bohuslän, Dalsland, Värmland, Närke, Östergötland, Småland and Halland, as well as the two largest Swedish lakes Vänern and Vättern. Victoria, Crown Princess of Sweden is Duchess of Västergötland.

Halland (Swedish pronunciation: [ˈhǎlːand] ) is one of the traditional provinces of Sweden (landskap), on the western coast of Götaland, southern Sweden. It borders Västergötland, Småland, Scania and the sea of Kattegat. Until 1645 and the Second Treaty of Brömsebro, it was part of the Kingdom of Denmark. Its name means Land of Rocky Slabs (Swedish: hällar) referring to the coastal cliffs of especially the northern part of the region.

Falster (Danish: [ˈfælˀstɐ]) is an island in south-eastern Denmark with an area of 486.2 km (187.7 sq mi) and 43,398 inhabitants as of 1 January 2010. Located in the Kattegat, Belts and Sound area, it is part of Region Zealand and is administered by Guldborgsund Municipality. Falster includes Denmark's southernmost point, Gedser Odde, near Gedser.

The largest town is Nykøbing Falster with over 40% of the island's inhabitants. Other towns include Stubbekøbing, Nørre Alslev and Gedser.

Lolland (Danish: [ˈlʌˌlænˀ] ; formerly spelled Laaland, literally "low land") is the fourth largest island of Denmark, with an area of 1,243 km (480 sq mi). Located in the Kattegat, Belts and Sund area, it is part of Region Sjælland (Region Zealand). As of 1 January 2022, it has 57,618 inhabitants. Lolland is closely connected to the island of Falster to its east. The locality of Sundby forms a cross-island urban area with Nykøbing Falster, the largest conurbation partially on Lolland. The most populated settlement on Lolland proper is Nakskov.

Mjøsa is the largest lake in Norway and the fourth deepest in Norway and Europe. It is located in the southern part of Norway, about 100 kilometres (62 mi) north of the city of Oslo. Its main tributary is the river Gudbrandsdalslågen flowing in from the north; the only distributary is the river Vorma in the south. Inflows would theoretically need 5.6 years to fill the lake. With an average depth of about 150 metres (490 ft), most of the lake's volume is under sea level. The average outflow of the lake (measured from 1931 to 1982) is 316 cubic metres per second (11,200 cu ft/s) which is about 9,959,000,000 cubic metres per year (1.1145×10 cu ft/Ms). Mjøsa contains about 56.2 km (13.5 cu mi) of water compared to the 14.8 km (3.6 cu mi) in the lake Røssvatnet, the second largest lake by volume in Norway.

With a surface elevation of about 121 metres (397 ft), the depth of Mjøsa means that the deepest part of the basin is located approximately 332 metres (1,089 ft) below sea level. This is lower than the deepest point of the sea inlet of Kattegat and the lower than the vast majority of Skagerrak off Norway's south coast. Mjøsa retains a larger average depth than both the North Sea and Baltic Sea respectively.

The Oslofjord (Norwegian: Oslofjorden, Urban East Norwegian: [ˈʊ̂ʂlʊˌfjuːɳ]; English: Oslo Fjord) is an inlet in southeastern Norway. The 120-kilometre (75 mi) fjord begins at the small village of Bonn in Frogn Municipality and stretching northwards to the city of Oslo, and then curving to the east and then south again. It then flows south to an imaginary line running between the Torbjørnskjær Lighthouse and Færder Lighthouse where it becomes part of the Skagerrak strait. The Skagerrak connects the North Sea and the Kattegat sea area, which leads to the Baltic Sea. The Oslofjord is not a fjord in the geological sense, but in the Norwegian language, the term fjord can refer to a wide range of waterways including inlets such as this one.

The bay is divided into the inner (indre) and outer (ytre) Oslofjord, separated by the 17 km (11 mi) long by 1 km (0.62 mi) wide Drøbak Sound. The innermost part is known as Bunnefjorden.

Vänern (/ˈveɪnərn/ VAY-nərn, US also /ˈvɛnərn/ VEN-ərn, Swedish: [ˈvɛ̂ːnɛɳ]) is the largest lake in Sweden, the largest lake in the European Union and the third-largest lake in Europe after Ladoga and Onega in Russia. It is located in the provinces of Västergötland, Dalsland, and Värmland in the southwest of the country. With its surface located at 44 metres (144 ft) above sea level and a maximum depth of 106 metres (348 ft), the lowest point of the Vänern basin is 62 metres (203 ft) below sea level. The average depth is a more modest 27 metres (89 ft), which means that the lake floor is above sea level on average.

Vänern drains into Göta älv towards Gothenburg and the Kattegat opening strait between the Atlantic Ocean’s North Sea and the Baltic Sea. It is the only one of the ten largest lakes in Sweden not to drain out to the eastern coastline. The Göta Canal built in the 19th century forms a waterway that runs to Vättern wholly rising when proceeding eastward, and then a navigable river linking the east coast with Vänern. The main inflow of water comes from Klarälven entering Vänern near Karlstad with its source in Trøndelag in Norway.

Vättern (/ˈvɛtərn/ VET-ərn, Swedish: [ˈvɛ̌tːɛɳ]) is the second-largest lake in Sweden, after Vänern, and the sixth-largest lake in Europe. It is a long, finger-shaped body of fresh water in south central Sweden, to the southeast of Vänern, pointing at the tip of Scandinavia. Vättern is deep, containing roughly half as much water as Vänern even though it covers about a third as much area; its deepest point is 128 metres (420 ft) below sea level.

Vättern drains into Motala ström through Bråviken into the Baltic Sea, but since 1832 it has also had a downstream connection through the Göta Canal to Vänern and the Kattegat tributary of the Atlantic Ocean. The lake has plenty of sources from rivers and small lakes, with the highest located sources being near Nässjö on the South Swedish Highland near the southeastern shoreline.

The current national border between Denmark and Sweden dates to 1660.

It is entirely a maritime border, along Kattegat and Øresund, and in the Baltic Sea between Bornholm and Scania.The territorial waters (12 mile zone) of the two countries meet exclusively along the Øresund, extending to approximately 115 kilometres (70 miles), between Höganäs and Falsterbo.There is one road and rail connection, 16-kilometre-long (10-mile) Øresund fixed link, opened in 2000, besides a number of ferry links.