January Trivia Question!
Most maritime academies have re-instituted lessons in celestial navigation because of concerns about GPS/GNSS vulnerability and the need to navigate when signals are not available because of solar weather or intentional jamming. One of the problems with these courses is:
- Many are only three or four hours long and don’t provide enough time for students to “master the art”
- Celestial navigation with hand-held sextants typically produces “fixes” that are only accurate to within about a nautical mile
- Knowing the precise time is essential for celestial navigation - which the students must get from GPS because few ships carry and maintain chronometers.
- All of the above.