Starfleet sent starships on five-year missions for exploratory purposes. Favored for five-year missions were explorers, both light and heavy, in both the 23rd century and the 24th century. The Romulan Tal Prai'ex oversaw one five-year mission in the 2380s, conducted under Annika Hansen at the command of the RIS Bouteina. (RIS Bouteina) Ships that took part in five-year missions[edit | edit source] Federation USS Arcturus USS Avenger USS Bajor (possible future year 2421) (Bait and Switch: "Brother on Brother, Daughter on Mother") USS Constitution USS Diponegoro USS Enterprise USS Galaxy USS Hannibal USS John Ross USS Retribution USS Ronin USS Scorpio USS Yorktown Romulan Star Empire RIS Bouteina External links[edit source] Five-year mission article at Memory Alpha, the canon Star Trek wiki. Five-year mission article at Memory Beta, the non-canon Star Trek wiki. Retrieved from "https://stexpanded.fandom.com/wiki/Five-year_mission?oldid=273874" Categories: Starfleet Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.