Lancaster Sound is a body of water in the Qikiqtaaluk Region, Nunavut, Canada. Wikipedia

Strait in the Canadian Arctic Archipelago Wikidata

A channel between Baffin Island and Devon Island, the eastern end of the Parry Channel and thus the Northwest Passage, leading into Baffin Bay to the east (the body of water separating Baffin Island from Greenland), and Viscount Melville Sound to the west. Wiktionary