Range Search.................................... 247, 249 — Page 393, Lesson 403

This is the index of the book — the alphabetical listing of topics and the page numbers where they appear. So this isn't a lesson in itself; it's the map of where everything lives in the text. Let me walk you through the entries that matter for radio navigation, because this index tells you exactly where to find each concept when you need it. Starting with the R section: Range Search is on pages 247 and 249. Rate of Descent — abbreviated ROD — is on page 162. RBI stands for Relative Bearing Indicator, and it's on page 90. RCS is on page 321. Receiver Noise Error is on page 317. Receiver Sensitivity is on page 20. Reference Signal is on page 112. Reference Stations are on page 321. Reflector is on page 58. Refracting Layers are on page 29. Regaining Inbound Track is on page 94. Regional Control Stations are on page 321. Relative Bearing is on pages 94 and 124. Restoration Time is on page 190. RHO-THETA is on page 243. RMI — the Radio Magnetic Indicator — is on pages 90, 122, 123, 124, and 127. RNAV is on pages 261 and 265. RTE is on page 273. Runway Instrument Approach Procedures are on page 97. Then the S section: Satellite Based Augmentation Systems — abbreviated SBAS — are on pages 319 and 320. Satellite Orbits are on page 305. Saturated is on page 249. Scalloping is on page 159. Searchlight is on page 188, and the Searchlight Principle follows right after. Now, here's the important thing about how to read this index as a pilot-in-training. When you see an abbreviation like RMI or RBI or SBAS, the index is telling you the full name and every page where that concept appears. So when you're studying, you can use this to cross-reference — for example, Relative Bearing appears on page 94 and page 124, and the Relative Bearing Indicator is on page 90. Those are related but distinct concepts, and the index keeps them separate so you know exactly where each one is discussed. Notice also the contrast between Reference Stations and Regional Control Stations — both on page 321, but they're different things. And RCS on the same page is likely the abbreviation for one of them. The index groups them together because they're in the same section of the book, but you'll need to distinguish them when you get there. One more thing to note: RHO-THETA on page 243 — that's a navigation system concept, and Saturated on page 249 is likely related to it, since they're close in page number. When you reach that section, you'll see how they connect. So this index is your reference tool. When you're studying a topic, you flip to these pages. When you're reviewing, you use this to find related concepts. It's the skeleton of the whole book — every term you'll need as a professional pilot is listed here, with its exact location.