Starting with M: Minimum Safe Altitude, abbreviated MSA, is on page 221 — Page 573, Lesson 574

This is the index of the General Navigation manual — the alphabetical listing of every topic in the book, with the page numbers where each is covered. I want to walk you through the entries that fall under the letters M, N, O, P, and Q, because these are the terms you'll be tested on, and each one points to a specific page where the full definition and explanation lives. Starting with M: Minimum Safe Altitude, abbreviated MSA, is on page 221. This is the lowest altitude you may fly in a given area while still maintaining terrain clearance — a critical safety figure for every flight. Minute of Latitude is on page 30, and it's directly tied to the next entry, Nautical Mile, also on page 30. One minute of latitude equals one nautical mile — that's the fundamental relationship that defines the nautical mile itself. Multi-drift Winds is on page 169; that's a technique for determining wind by taking drift readings on more than one heading. Moving to N: Nautical Mile, page 30, as I said, is the distance represented by one minute of latitude. Nautical Twilight, page 425, is the period when the sun is between 6 and 12 degrees below the horizon — important for determining when you can see stars for celestial navigation. Navigation Techniques, page 227, covers the practical methods of fixing your position. New Track Reference, page 205, is the procedure for re-establishing a track after you've been blown off course. North Celestial Pole, or NCP, page 384, is the point in the sky directly above the Earth's North Pole — the reference for celestial navigation. Nouvelle Triangulation de France, abbreviated NTF, page 3, is the French geodetic datum — a specific coordinate reference system. Under O: Oblate Spheroid, page 3, is the actual shape of the Earth — flattened at the poles and bulging at the equator. One Sixth Rule, page 341, is a rule of thumb for correcting track errors. Orthomorphism, pages 288 and 297, is the property of a map projection that preserves angles and shapes locally. OS36, page 3, is another geodetic datum — the Ordnance Survey of Great Britain 1936. Under P: Parallel of Origin, pages 341 and 344, is the latitude at which a projection is true to scale. Parallel of Tangency, page 341, is the latitude where the projection surface touches the Earth. Parallels of Latitude, page 8, are the east-west lines on a map. Perihelion, page 380, is the point in Earth's orbit where it's closest to the sun. Planned Track, page 199, is your intended path over the ground. Polar Diameter, page 3, is the Earth's diameter measured pole to pole — shorter than the equatorial diameter because of the oblate shape. Polar Grids, page 465, is a navigation system used near the poles where meridians converge. Polar Stereographic Graticule, page 365, and Polar Stereographic Projection, page 365, are the map projection and its grid used for polar navigation. Port, page 125, is the left side of the aircraft when facing forward. Position Line, page 477, is a line on which your position lies — you need two or more to get a fix. Position Reference Systems, page 7, are the coordinate systems used to define position. Practice Flight Plan, page 151, is a worked example of flight planning. Pressure Altitude, page 88, is altitude indicated when the altimeter is set to the standard pressure of 1013.25 hectopascals. Pressure (or Position) Error, page 105, is the error in the altimeter caused by static pressure at the static port. Finally, under Q — the excerpt cuts off right at the start of that letter, so there are no Q entries shown here. Now, the key takeaway from this index: it's a map of the entire syllabus. Every one of these terms — MSA, nautical mile, oblate spheroid, position line, pressure altitude — is a topic you'll need to master. When we work through the actual chapters, we'll hit each of these in full detail. For now, just recognize the structure: this is your roadmap for the whole course.