🧷 Authentic Classroom Explanation by IAS Monk

📌 The Question:

Which one of the following countries has its own Satellite Navigation System?

(a) Australia
(b) Canada
(c) Israel
(d) Japan

✅ Answer: (d) Japan

🧑‍🏫 Classroom Explanation:

Satellite Navigation Systems provide real-time positioning, navigation, and timing (PNT) services by using signals from satellites.

Currently, the major Global Navigation Satellite Systems (GNSS) are:

• GPS — USA
• GLONASS — Russia
• Galileo — European Union
• BeiDou — China

Apart from these, some countries operate regional navigation systems:

• India operates NavIC (IRNSS)
• Japan operates QZSS (Quasi-Zenith Satellite System)

Now check the options:

• Australia ❌ — No independent satellite navigation system
• Canada ❌ — Relies on GPS
• Israel ❌ — No independent GNSS
• Japan ✅ — Operates QZSS, its own regional satellite navigation system

Hence, Japan is the correct answer.

🔍 Curiosity Raiser:

🛰️ Why does Japan need a special navigation system when GPS already exists?

📚 Enrichment Notes (UPSC Edge):

• QZSS complements GPS by improving accuracy in urban canyons and mountainous regions
• Satellites follow highly inclined elliptical orbits, staying nearly overhead over Japan
• Used in:
  • Disaster management
  • Autonomous vehicles
  • Precision agriculture
  • Maritime navigation
• NavIC (India) covers India and ~1500 km beyond its borders

🧘 IAS Monk Whisper:

🌀 Navigation is not about knowing where you are — it is about knowing where you can go.