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Figure 15.1. Constant Pressure Surface.............................................................................................. 314
Figure 15.2. Contours ......................................................................................................................... 314
Figure 15.3. Changing Contours of Constant Pressure Surface ......................................................... 315
Figure 15.4. Pressure Gradient ........................................................................................................... 315
Figure 15.5. Buys-Ballots Law........................................................................................................... 316
15.4. Pressure Computations and Plotting .............................................................................. 316
15.5. D Readings ..................................................................................................................... 316
15.6. Effective True Airspeed (ETAS).................................................................................... 317
15.7. K Factor......................................................................................................................... 317
Figure 15.6. Pastagram...................................................................................................................... 318
Figure 15.7. Effective True Airspeed ................................................................................................. 319
15.8. Crosswind Displacement................................................................................................ 319
16 AFPAM11-216 1 MARCH 2001
Figure 15.8. Pressure Pattern Worksheet/K Factors Table................................................................. 320
Figure 15.9. K Factors Table Below 20o ............................................................................................ 320
15.9. Pressure Line of Position (PLOP) .................................................................................. 321
Figure 15.10. Pressure Pattern Displacement ....................................................................................... 321
15.10. Bellamy Drift.................................................................................................................. 321
Figure 15.11. Plotting the PLOP........................................................................................................... 322
Figure 15.12. Solution of Bellamy Drift by Using PLOP .................................................................... 322
15.11. MB-4 Solution of Bellamy Drift .................................................................................... 323
Figure 15.13. Computer Solution of Bellamy Drift.............................................................................. 323
Figure 15.14. Mathematical Solution of Bellamy Drift........................................................................ 324
Section 15B Limitations of Pressure Differential Techniques
15.12. Limitations ..................................................................................................................... 324
15.13. Summary ........................................................................................................................ 324
Figure 15.15. Fix Using PLOP and Celestial Line of Position............................................................. 325
Chapter 16—NAVIGATION SYSTEMS
Section 16A Introduction
16.1. Basics ............................................................................................................................. 326
Section 16B Navigation Systems
16.2. Basics ............................................................................................................................. 326
16.3. Types of Systems ........................................................................................................... 326
16.4. The Ideal System............................................................................................................ 327
16.5. Components.................................................................................................................... 327
16.6. Computer Unit................................................................................................................ 327
16.7. Sensors ........................................................................................................................... 328
16.8. Determining Position...................................................................................................... 329
16.9. Decision Algorithm ........................................................................................................ 329
Section 16C Inertial Navigation System (INS)
16.10. Basics ............................................................................................................................. 330
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F16 Flying Operations AIR NAVIGATION(17)
