Errors in geography: Neil's plane goes down en route from Havana to Mexico City and the radio announcer gives his estimated position as 22°N 88°W. This would be off the Yucatán Peninsula about 400 miles west of Havana, which makes sense. But when Jim and Jill get to the airport, the position marked on the map is south of the Dry Tortugas. This would be about 24°30'N 83°W or about 100 miles north of Havana, and Jim's compass shows him flying north to reach the site.
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