Category 1 is always the greatest level of hazard (that is, it is the most hazardous within that class). If Category 1 is further divided, Category 1A within the same hazard class is a greater hazard than category 1B. Category 2 within the same hazard class is more hazardous than category 3, and so on.
Correction: An earlier version of this story incorrectly stated that Charles Nungesser and Francois FranÃ§ois coli would have been the first pilots to make a nonstop transatlantic. Flight a pair Of british pilots made such a flight in. 1919
Amelia Earhart Flies Across the Atlantic. In 1928, Amelia Earhart received a phone call that would change her life. She was invited to become the first woman passenger to cross the Atlantic Ocean in a plane. The idea of just going as 'extra weight' did not appeal to me at all, she said, but she accepted the offer nonetheless.