Shore Leave - S1-E16
Trivia: "Shore Leave" was the first of many Star Trek episodes (and movies) partially shot at Vasquez Rocks, a distinctive California desert rock formation named for a 19th Century bandit who once had a hideout there. Kirk and Finnegan's fistfight and Kirk's encounter with Ruth were both shot at Vasquez. The formation is most prominently featured in "Arena," when Kirk pushes the boulder off its peak onto the Gorn.
Shore Leave - S1-E16
Trivia: William Shatner recalls having a "lame-brained" attack of bravado during "Shore Leave's" filming and insisting that Kirk should wrestle the tiger - without a stunt double. Gene Roddenberry finally convinced him that he was much too valuable to the show to risk his life for a stunt. Thirty years later on a Sci Fi Channel special, Shatner said, "Thank you, Gene, for preventing me from becoming a hair ball!"
Shore Leave - S1-E16
Trivia: Because Theodore Sturgeon's original script for "Shore Leave" was so complex, many scenes were too expensive to film. Gene Roddenberry had to hastily rewrite many of these minutes before they were shot, resulting in some segments that were ad-libbed because the rewrites hadn't been completed. McCoy's "distracted" scene with Yeoman Barrows is one of these.
Chosen answer: If they're in orbit, they're being pulled along by the planet's gravity well, therefore, impulse engines would only be used for minor corrections and would be "on standby" while in orbit, but not active. (Like keeping your car idling without revving the engine and creating plumes of exhaust).
Captain Defenestrator
Thank you for the info.
Movie Nut