question: What is used for navigation?
choices.text: marine planes Otoacoustic barometer the Arctic a compass seismometer boats
choices.label: A B C D E F G H
fact2: Distance and direction are the foundation of GPS-based navigation.
combinedfact: a compass is used for navigation
formatted_question: What is used for navigation? (A) marine (B) planes (C) Otoacoustic (D) barometer (E) the Arctic (F) a compass (G) seismometer (H) boats