Both the mouth of the Atran and which sea flow into Kattegat?
Ätran (river) Ätran is a Swedish river. The river is about 240 km long, and has its source in Gullered, Västergötland, at a height of 332 m above sea level. The river has its mouth in Falkenberg, Halland, where the river enters Kattegat.
Little Belt (ship) At least six vessels, including two belonging to the British Royal Navy, have borne the name Little Belt, a translation from the Danish of "Lillebælt", the name of the strait that separates Funen from the Danish mainland and that links the Kattegat to the Baltic Sea. The merchant vessels and the second Royal Navy vessel were named to commemorate HMS "Little Belt" , which was one of the protagonists in the Little Belt Affair, or perhaps the affair itself.