Section 63.53 - Knowledge requirements(a) An applicant for a flight navigator certificate must pass a written test on- (1) The regulations of this chapter that apply to the duties of a flight navigator;(2) The fundamentals of flight navigation, including flight planning and cruise control;(3) Practical meteorology, including analysis of weather maps, weather reports, and weather forecasts; and weather sequence abbreviations, symbols, and nomenclature;(4) The types of air navigation facilities and procedures in general use;(5) Calibrating and using air navigation instruments;(6) Navigation by dead reckoning;(7) Navigation by celestial means;(8) Navigation by radio aids;(9) Pilotage and map reading; and(10) Interpretation of navigation aid identification signals.(b) A report of the test is mailed to the applicant. A passing grade is evidence, for a period of 24 months after the test, that the applicant has complied with this section.Doc. No. 1179, 27 FR 7970, Aug. 10, 1962, as amended by Amdt. 63-19, 43 FR 22639, May 25, 1978