Let's start at the top — Page 657, Lesson 768

This is the index of the book — the alphabetical listing of topics with their page numbers. So what I want to walk you through is how to read this index as a professional, because it tells you exactly where every concept lives in the syllabus. Let's start at the top. SI — that's the Système International d'unités, the International System of Units — appears on page 75. That's where the book covers the standard units you'll use throughout your career: metres, kilograms, seconds, and so on. Then we have E-type, on page 119. That's a specific classification of instrument — I'll get into what distinguishes an E-type when we reach that page. EU-OPS Requirements, page 357 — these are the European operating rules that govern commercial air transport. You'll need to know these cold for your ATPL. Now here's a cluster of display-related terms. Expanded Arc, page 286 — that's a navigation display mode. Expanded ILS, page 292 — that's the instrument landing system display expanded. Expanded VOR, page 290 — the VHF omnidirectional range display expanded. And Expansion itself, page 122 — that's the general principle of expanding a display. Then EXP ARC, page 286 — that's the abbreviated form of Expanded Arc, same page, same concept. Eye Reference Point, page 8 — that's the design eye position in the cockpit, the point from which the pilot's field of view is measured. Now we move into the F section. FADEC, page 397 — that's Full Authority Digital Engine Control. That's the system that manages the engine's fuel and thrust settings automatically. Fahrenheit, page 2 — the temperature scale, covered right at the start of the book. FAIL, page 278 — that's the annunciation, the warning you see when a system fails. Then we have a critical trio of autopilot failure modes. Fail-operational, also called Fail-active, page 380 — that means after a failure, the system continues to operate fully, with no degradation. Fail-passive, also called Fail-soft, page 380 — that means after a failure, the system disengages but leaves the aircraft in a safe, controllable state. And Fail-passive Operation, also page 380 — that's the operational consequence of that mode. Fail Safe Autopilot, page 352 — that's the design philosophy where the autopilot defaults to a safe state on failure. Failure Annunciation, page 295 — that's the visual indication of a failure. Failure Warning, page 99 — that's the alerting system that tells you something has failed. Now the communications and navigation cluster. FANS, page 325 — that's Future Air Navigation Systems. FANS A, page 325 — that's one variant. FANS B, page 328 — that's the other variant. These are the data-link systems for air-ground communication. Faraday's Law, page 216 — that's the electromagnetic principle that governs how generators and transformers work. You'll need this for the electrical and instrument fundamentals. Fast Erection System, page 178 — that's the mechanism that quickly erects a gyroscope, used in attitude instruments. FCC, page 294 — that's the Flight Control Computer, the brain of the autopilot system. Then we have the flight director cluster. FD Fail Indications, page 342 — that's what you see when the flight director fails. FD Go-around, abbreviated GA, page 346 — that's the flight director's guidance during a go-around manoeuvre. FDIU, page 499 — that's the Flight Data Interface Unit, which routes flight data. FD Manoeuvre Protection, page 346 — that's the envelope protection the flight director provides during manoeuvres. FDR, page 497 — that's the Flight Data Recorder, the crash-protected recorder that logs flight parameters. And the last entry is Fee — that's just the start of the next index term, cut off here. So that's the index. It's a map of the whole book. When you're studying, you use this to jump straight to a topic. When you're revising, you use it to check you've covered everything. And when you're in the exam, you'll be glad you know exactly where each of these concepts lives.