Not entirely designed to be occupied, the utility lines in a starship or in an installation are designed large enough to allow for engineering personnel to have access to various utilities which are routed through the lines. 'Utility lines' is a term given to the tight crawl-ways in which conduits, pipes, cables, and other utility systems are ran through. Often, these crawl spaces are a half-meter to meter in width, which demands that engineers either be slim, or have assistance in moving in or out of the passage.