This ship-related article is a stub. You can help STEU by expanding it. The Halcyon-class minesweepers were a type of starship on active duty in Starfleet during the late 23rd century. They entered service about 2268. (Federation Reference Series 6) Like the Black Swan-class large sloops and the Guillemot-class sloops, the Halcyons were a successor class to the Flower-class sloops of the Four Years War period. Retrieved from "https://stexpanded.fandom.com/wiki/Halcyon_class?oldid=125212" Categories: Ship stubs Federation starship classes Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.