The narrowest part on the northern edge of the basin is named the Southern Quark or South Kvarken (Swedish: Södra Kvarken, Finnish: Ahvenanrauma).
Many ferries moving between Finland and Sweden cross the Sea of Åland.
[2] The official English Language name of the sea area as defined by the Baltic Marine Environment Commission HELCOM, is "Åland Sea".
[3] The HELCOM nomenclature is also referenced by the International Council for the Exploration of the Sea (ICES).
Media related to Sea of Åland at Wikimedia Commons