It's a reference tool, not a lesson in itself — Page 657, Lesson 773

This is the index of the book — the alphabetical list of topics and the page numbers where they appear. It's a reference tool, not a lesson in itself. So what I want to do is walk you through what this index tells you about the structure of the course, and how you should use it as a professional pilot in training. Look at the entries here. You've got "Heading Select Marker" on page 219, "Heading Selector Control" on page 219, "Heading Warning Flag" on page 219. These are all components of the heading system — the marker is what you set to your desired heading, the selector control is the knob you turn to set it, and the warning flag is the indicator that tells you the system has failed. They're grouped together in the index because they're all part of the same instrument. Now, notice the page numbers. "Heater" is on page 14, "Heating Element" on page 28, "Heating Error" on pages 29 and 30. These are all related to the pitot-static system — the heater that prevents icing on the probes, the heating element inside the instrument, and the error that heating introduces. The index shows you they're spread across different pages because they appear in different contexts, but they're all part of the same system. You'll also see units and measurements here. "Hectopascal" on page 2 — that's the unit of pressure used in aviation, the same as the millibar. "Hours" on page 2 — that's the time unit. These are fundamental quantities you'll use throughout the course. Then you have the acronyms. "IAS" on pages 42 and 44 — that's Indicated Airspeed, the speed shown on the airspeed indicator. "IMN" on page 86 — that's Indicated Mach Number, the speed relative to the speed of sound. "HSI" on page 281 — that's the Horizontal Situation Indicator, the instrument that combines heading and navigation information on one display. "ILS" on pages 286, 288, and 385 — that's the Instrument Landing System, the precision approach aid. You've also got concepts like "High Angle of Attack" on page 415 and "High Speed Flight" on page 83. These are aerodynamic conditions you'll study — high angle of attack is when the wing is pitched up significantly, and high speed flight is when you're operating near or above the speed of sound. And you have computer-related terms. "High Level Language" on page 310 — that's a programming language like C or Ada, used in flight management computers. "High Speed Micro Processors" on page 257 — those are the fast processing chips used in modern avionics. Now, here's the key point about how to use this index. When you're studying, you use it to cross-reference topics. For example, if you're learning about the ILS, you see it appears on pages 286, 288, and 385. That tells you the ILS is covered in three different places — probably in the navigation section, in the flight instruments section, and in the flight management section. You need to understand it in all three contexts. Also notice "IDENT" on pages 273 and 274 — that's the transponder ident function, the button you press to make your aircraft stand out on radar. And "Illuminated Annunciators" on page 278 — those are the lit warning lights on the instrument panel. So the index is your map. It tells you where everything is, and it shows you how topics are related by their page groupings. When you're revising, you use it to find all the places a particular system is discussed. That's how you build a complete picture. Now, this is just the index — it's the starting point. The actual lessons are on those pages. So when you're ready, we move into the real content.