Trivia: While Hawkeye, Radar, and BJ are in General Dickering's jeep, when they meet up with some GIs on the road Hawkeye asks them, "Anybody here from Maine?" and one answers that he's from Vermont, to which Hawkeye responds, "Close, but no cigar." What's funny is that earlier in the series Hawkeye has said that he's from Vermont not Maine.
Trivia: Frank says "Give me a man when he's 28, and he's mine for life." When this episode aired, Mike Farrell (Capt. B.J. Hunnicutt) was 36.
Answer: The C-42 was a military variant of the Douglas DC-2. Very few C-42's were built, so it's questionable that Potter would specifically have seen that particular model, but, given his military background, it's not entirely unreasonable that he might use the military designation even when the aircraft in question is actually a civilian DC-2.
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