An advanced starship, discovered adrift in space by the USS Discovery. Its crew is long since dead or missing, but the ship itself is not dead. Over the course of ten months it is repaired and a crew assigned as it undertakes a new mission of exploration, under the command of Captain Trueman.

The ship’s original name apparently refers to a hunter of ancient legend, but since nobody could agree on how it should be pronounced, the name Orion stuck instead.