Why, do we think, was Scotty a part of the Enterprise chain of command? I know in theory, the officer on deck could be whoever the Captain appoints So we got DeSaul for one episode But from what we gather, more often than not if Kirk and Spock were not aboard ship, Scotty was the default Is it common for chief engineers to be placed in charge? My feeling is they have very specialized skills that would basically require them to stay 'downstairs' Geordi, Torres, etc were never placed in command (Geordi did command the Enterprise early on, but he was a bridge officer at that time and still in command red) It seems as though Scotty was formally part of the command structure I always read the TOS chain of command as being Kirk, Spock, Scotty, Sulu, Uhura Unless it was simply that Kirk had reasons to personally trust him in command, or he'd had some experience with starship command that other chief engineers hadn't? It's peculiarly noteable that he never performs the role after the original five year mission, but then by The Final Frontier it's simply presumed the likes of Chekov have moved up in rank Any idea if there's precedent for any of this? And what are your thoughts of Scotty in command?