True Direction on pages 5 and 45 — that's direction measured relative to… — Page 575, Lesson 578

This is the index of the book — the map of everything we're going to cover in General Navigation. Let me walk you through what's here, because this tells you exactly what a professional pilot needs to master. Starting with the Earth itself: we have The Equator on page 8, The Meridians on page 8, and The Prime (or Greenwich) Meridian on page 8. These are your fundamental reference lines — the equator is the great circle halfway between the poles, meridians are the lines of longitude running pole to pole, and the Prime Meridian is the zero-longitude reference through Greenwich. Then we have The Tropic of Cancer and The Tropic of Capricorn on page 11 — those are the latitudes where the sun is directly overhead at the solstices. And True Altitude appears on page 11 as well — that's your actual height above mean sea level, as opposed to indicated altitude. Now, the coordinate system: World Geodetic System 1984 (WGS 84) on page 3 — that's the modern standard model of the Earth's shape used for GPS and global navigation. True Direction on pages 5 and 45 — that's direction measured relative to true north, not magnetic. And The Angle of Dip on page 62 — that's the vertical angle between the true horizon and the magnetic horizon caused by the Earth's magnetic field pulling the compass needle downward. Moving into compass work: Variation on pages 46 and 62 — the angular difference between true north and magnetic north at your location. Updating Isogonals on page 52 — isogonals are lines of equal variation, and updating them means correcting for how they shift over time. Steering by Compass on page 462 and Steering by Gyro on page 464 — two different ways to hold a heading, one using the magnetic compass, the other using a gyroscopic instrument. And Transport Wander on page 465 — that's the apparent drift of a gyro caused by the Earth's rotation as the aircraft moves over the surface. Now the speed and temperature section — this is core. Static Air Temperature (SAT) on page 88 — the actual temperature of the air around you, undisturbed by the aircraft. Total Air Temperature (TAT) on page 88 — the temperature you measure including the ram rise from the aircraft's speed compressing the air. True Airspeed (TAS) on page 88 — your actual speed through the air mass. Then we have the conversions: TAS and Altitude Conversions on page 105, TAS from CAS on page 107 — converting Calibrated Airspeed to True Airspeed — and TAS from Mach Number on page 113. True Altitude comes up again on page 115. And The Navigation Computer on page 69 — that's your flight computer, the CRP-5, which you'll use for all these conversions. Let me show you those figures — Figure 6.3 shows the CRP-5 windows, Figure 6.4 shows aligning FL200 with -25°C, and Figure 6.5 shows CAS on the inner scale against TAS on the outer scale. That's the mechanical heart of your navigation computer. Now units and conversions: Statute Mile on page 30 — that's the land mile of 5,280 feet, distinct from the nautical mile. Volume Conversions on page 93 and Volume to Weight on page 94 — converting fuel volumes to weights, essential for flight planning. Wind and velocity — this is where navigation gets practical. Wind Vector on page 127 and Triangle of Velocities on page 127 — the fundamental vector triangle relating your heading, your track, and the wind. Wind Correction Angle (WCA) on page 125 — the angle you crab into the wind to maintain your desired track. Wind Finding on page 158 — determining the wind from your observed drift. Two-drift Winds on page 172 — finding wind using two different headings. Wind Components on page 175 and Tailwind Components on page 181 — breaking the wind into headwind/tailwind and crosswind parts. Track Error Angle on pages 199 and 202 — the angular difference between your intended track and your actual track. Track Made Good on page 199 — the actual path you've flown over the ground. And VOR Crosstrack on page 214 — using VOR to measure how far off track you are. Time and the sun: Time on page 379, Zenith on page 383 — the point directly overhead. Transit on page 386 — when a celestial body crosses your meridian. Zone Time (ZT) on page 398 — the standard time in a time zone. Summer Time/daylight Saving Time (DST) on page 402 — advancing the clock for longer daylight. Sunrise and Sunset on page 421, and Twilight on page 424 — the periods of partial light before sunrise and after sunset. Finally, the Lambert projection: Summary of Lambert Properties on page 347 — the conformal conic projection used for aeronautical charts. And navigation techniques: The 'Cocked Hat' on page 483 — the triangle of intersecting position lines showing your fix uncertainty. VOR QDM and VOR Radial on page 478 — magnetic bearing to the station and the radial from the station. That's your complete map of General Navigation. Every one of these topics we'll cover in depth as we go through the book.