Class II navigation is space-based or non-ground-based. Which of the following best describes it?

Class II navigation is space-based or non-ground-based. Which of the following best describes it?

• A. Ground-based navigation
• B. Only GPS
• C. Space-based navigation (GPS) or internal navigation
• D. Only inertial navigation

Answer: (C)

Non-ground-based methods determine position without relying on ground beacons. This includes space-based systems like GPS, which use satellites to provide position, and onboard, self-contained systems like inertial navigation that use accelerometers and gyros to track movement from a known starting point. Because Class II navigation encompasses either GPS or internal navigation, it best fits the description of space-based navigation (GPS) or internal navigation. Ground-based navigation relies on ground facilities, so it isn’t Class II. Saying “Only GPS” leaves out internal navigation, and “Only inertial” leaves out GPS, so the choice that includes both options is the correct one.

Non-ground-based methods determine position without relying on ground beacons. This includes space-based systems like GPS, which use satellites to provide position, and onboard, self-contained systems like inertial navigation that use accelerometers and gyros to track movement from a known starting point. Because Class II navigation encompasses either GPS or internal navigation, it best fits the description of space-based navigation (GPS) or internal navigation. Ground-based navigation relies on ground facilities, so it isn’t Class II. Saying “Only GPS” leaves out internal navigation, and “Only inertial” leaves out GPS, so the choice that includes both options is the correct one.