Radio Navigation

Difficulté: HighPoids à l'Examen: High

Aperçu

Radio Navigation covers all ground-based and satellite-based navigation systems used in aviation. This includes VOR, DME, NDB/ADF, ILS, MLS, GPS/GNSS, RNAV, and radar systems. Understanding signal propagation, errors, and system limitations is essential.

Sujets Clés

Radio wave propagation and electromagnetic principles
VOR — principles, errors, DVOR
DME — operation, slant range error, co-location
NDB/ADF — principles, errors, relative bearing
ILS — localizer, glide slope, markers, categories (CAT I/II/III)
MLS (Microwave Landing System)
GNSS/GPS — satellites, errors, RAIM, augmentation (SBAS, GBAS)
RNAV and RNP — area navigation concepts
Radar — primary, secondary (SSR), Mode S, ADS-B
FMS and multi-sensor navigation

Conseils d'Étude

Learn each nav aid systematically: principle, indications, errors, limitations

Create comparison tables between navigation systems

Understand ILS categories and their decision height/RVR requirements

Study GPS error sources and how augmentation systems mitigate them

Practice ADF bearing problems (relative bearing, QDM, QDR)

Questions Types

1. A VOR operates in which frequency range?

A. 108.0 - 117.95 MHz (VHF)✓ Correct

B. 190 - 535 kHz (LF/MF)

C. 960 - 1215 MHz (UHF)

D. 329.15 - 335.0 MHz (UHF)

2. ILS Category IIIB allows approach to:

A. 200 ft decision height

B. 100 ft decision height

C. 50 ft decision height or no decision height with RVR 75m minimum✓ Correct

D. No decision height and no RVR requirement

3. DME measures:

A. Ground distance to the station

B. Slant range distance to the station✓ Correct

C. Bearing to the station

D. Altitude above the station

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