The USS Magellan (NCC-71820) was an Olympus-class dreadnought on active duty in Starfleet during at least the late 24th century. It was upgraded from the Galaxy-class starship of the same name. The upgrade began late 2376, when Magellan returned to drydock. Over the next several months, additions included a phaser cannon and most notably, a third warp nacelle. In 2377, she was placed under the command of Captain Elizabeth Shelby who oversaw completion of the refit. In 2379, the Magellan participated in the commissioning ceremonies at Deep Space 9. (Star Trek: Pendragon: "Restoration")