The Crucible is a repair spacecraft developed by Anvil Aerospace for the United Empire of Earth Navy (UEEN), intended to provide field repairs of a variety of ship classes. It includes a rotating bridge that can overlook a large workspace and a series of remote manipulator arms that allow the crew to either repair smaller spacecraft or to dock alongside larger damaged ships. Its repair bay can be pressurized and also detached for remote use. Crucibles are operated by the UEEN and a variety of private enterprises.