First, the altimeter family — Page 663, Lesson 794

This is the index of the book — a map of the whole syllabus. Let me walk you through the entries that matter for your instrumentation training, because each one points to a concept you'll need to master. First, the altimeter family. You have the Simple Altimeter at page 55, then Servo-assisted Altimeters at page 59, with Servo-assistance on the same page. The Servomotor appears at page 354. The simple altimeter is your basic pressure instrument — static pressure fed into the case, an aneroid capsule expanding and contracting with height. The servo-assisted version adds a motor to drive the display more precisely, reducing friction errors. That servomotor is the electric actuator doing the work. Then we have the Slip Indicator at pages 185 and 187, with Slipping in and Skidding out both at page 188. These are your turn-and-slip instruments — the slip indicator shows whether you're coordinated in a turn. Slipping in means the ball falls toward the inside of the turn, skidding out means it falls toward the outside. Side-slipping at page 17 is the related flight condition. On the magnetic side, Soft Iron at page 109 and Soft Iron Magnetism at page 202 — that's the temporary magnetism induced in the aircraft's structure by the Earth's field, which affects your compass. Slaved Gyro Compass at page 211, with SLAVE and SLAVED both at page 219, and the Slaving Amplifier at page 211. That's the system that takes your directional gyro and continuously corrects it against the magnetic compass — the slaving amplifier processes the error signal and drives the gyro to match the magnetic heading. Shock Wave at page 83 — that's the compressibility effect at high Mach numbers, relevant to your airspeed and altitude sensing at speed. In the electronics section, Shift Registers at page 308, Software at page 309, Software Used in Aircraft at page 310, and the Signal Processor at page 354. The signal processor takes raw sensor data and converts it into usable information for the displays. SHF at page 264 — that's Super High Frequency, the band from 3 to 30 gigahertz, used in weather radar. SG and SGs at page 281 — those are strain gauges, the sensors that measure deformation, used in weighing or load measurement. SITA at page 328, expanded at page 318 as Société Internationale de Télécommunications Aéronautiques — that's the international aeronautical telecommunications organisation that handles airline messaging and data services. Single Mode at page 272 — that's a fibre-optic transmission mode, where light travels along one path in the fibre core. Sluggish at page 127 — that describes an instrument response that's slow or lagging, often a fault indication. Space Gyros — the entry cuts off there, but that's your gyroscopic reference systems used for attitude and heading in inertial navigation. Serviceability Checks at page 176 — the pre-flight and periodic checks you perform to confirm an instrument is fit for service. That's the full sweep of the S-section. Each of these will come up in detail as we work through the chapters — the altimeters, the compass systems, the gyros, the electronics. You now know where everything lives in the book.