Starting with E — Page 389, Lesson 390

This is the index of the Radio Navigation manual — the alphabetical listing of every topic we'll cover. I want to walk you through the entries that fall under the letters E, F, and G, because these are the terms you'll be tested on, and I want you to recognize each one by its proper name. Starting with E. We have "EM Energy" on page 4 — that's electromagnetic energy, the foundation of all radio wave propagation. Then "Emission Designators" on page 47 — that's the standardized code that describes a transmission's characteristics, like its modulation type and bandwidth. "En Route NDBs" on page 88 — Non-Directional Beacons used for navigation between waypoints. "Ephemeris" on page 305 — that's the precise orbital data of a satellite, essential for GPS positioning. Related to that, "Ephemeris Errors" on page 317 — the inaccuracies in that orbital data that degrade position accuracy. "ETRS89" on page 306 — that's the European Terrestrial Reference System 1989, a coordinate frame used for mapping and navigation. Then we have the display modes: "Expanded ILS Mode" on page 288, "Expanded Rose VOR/ILS" on page 286, and "Expanded VOR Mode" on page 287 — these are the different ways your navigation display can present VOR and ILS information, with "expanded" meaning a magnified or zoomed view of the course deviation. Moving to F. "Fading" on page 20 — the variation in signal strength at the receiver. "FAF" on page 160 — that's the Final Approach Fix, the point where the final approach segment begins. "False Glide Slope(s)" on page 154 — spurious glide path signals that can mislead an ILS approach. "Fan-shaped" on page 211 and the "Fan-shaped" Beam on page 216 — a beam that spreads out in a fan pattern, used in certain navigation aids. "Final Approach" on page 160 — the segment of an approach from the FAF to the runway. "First Returning Sky Wave" on page 27 — the first sky wave signal that returns to Earth after reflection from the ionosphere. "Flare" on page 174 — the maneuver just before touchdown where the aircraft pitches up to reduce descent rate. "Flat Plate" on page 211 and "Flat Plate Antenna" on page 192 — a type of antenna with a flat, planar surface. "Flat Plate Array" on page 61 — an array of such elements. "F-layer" on page 25 — the highest ionospheric layer, important for HF propagation. "Fly Left" and "Fly Right" on page 126 — the commands given by a navigation display to steer the aircraft left or right to intercept the desired course. "FM Broadcasts" on page 160 — Frequency Modulation radio transmissions. "FMC" on pages 266, 268, 269, and 285 — the Flight Management Computer. "FMCS" on page 268 — the Flight Management Computer System. "Framing Pulses" on page 231 — synchronization pulses in a signal structure. "Frequency Bands" on page 8 — the divisions of the electromagnetic spectrum. "Frequency Modulation (FM)" on pages 43 and 46 — a modulation technique where the carrier frequency varies with the signal. "Frequency Pairing" on page 148 — the assignment of paired frequencies for a navigation aid. "Fruiting" on page 233 — a type of interference in secondary radar. "Full Rose ILS Mode" on page 288, "Full Rose VOR/ILS" on page 286, and "Full Rose VOR Mode" on page 287 — the full 360-degree compass rose display modes for VOR and ILS. Finally, G. "GAGAN" on page 320 — the GPS Aided Geo Augmented Navigation system, a satellite-based augmentation system for India. "Garbling" on page 233 — the corruption of signals when they overlap. And "GBAS" on page 319 — the Ground-Based Augmentation System, which enhances GPS accuracy near an airport. Now, I want to pause on the display modes because they're a common source of confusion. The "Full Rose" and "Expanded" modes are two ways to present the same VOR or ILS data. In Full Rose mode, you see the entire 360-degree compass rose with the course deviation indicator in the center. In Expanded mode, the display zooms in on a smaller arc of the rose, typically 90 degrees or so, which gives you a larger, more detailed view of the deviation scale. The same distinction applies to VOR and ILS — you have Full Rose VOR, Expanded VOR, Full Rose ILS, and Expanded ILS. The ILS modes specifically show the localizer and glide slope deviations. Let me also clarify the difference between FMC and FMCS, since they appear together. The FMC, the Flight Management Computer, is the hardware unit that performs the navigation and performance calculations. The FMCS, the Flight Management Computer System, is the broader system that includes the FMC, the control display unit, and the interfaces to other aircraft systems. So the FMC is a component within the FMCS. And on the navigation side, "Fly Left" and "Fly Right" are the raw steering commands. When your course deviation indicator shows you're off course, it tells you to fly left or right to correct back to the desired radial or localizer. These are the direct commands you act on during an approach or en route tracking. One more distinction worth noting: "Fruiting" and "Garbling" both relate to secondary surveillance radar, but they're different failure modes. Fruiting is the reception of replies from transponders that were interrogated by a different radar — it's unsynchronized interference. Garbling is when two or more transponder replies overlap in time, so the radar can't decode them properly. Both degrade the radar picture, but they have different causes. Now, let's look at the figures that illustrate these display modes. shows the Map mode, which is another way to present navigation data — a moving map display. And shows the Electronic Flight Information System, or EFIS, which is the overall display system that presents all these modes to you in the cockpit. So that's the E, F, and G section of your index. These are the terms we'll be expanding on throughout the course, and you'll see them again in their respective chapters.