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12 Jan 2026·Source: The Indian Express
3 min
Environment & EcologyScience & TechnologyEXPLAINED

Winter Fog Disruptions: Railways and Airlines Implement Strategies for Safe Operations

Railways and airlines employ diverse strategies to mitigate fog-induced disruptions during winter.

Winter Fog Disruptions: Railways and Airlines Implement Strategies for Safe Operations

Photo by Nathan Anderson

Background Context

The development of CAT III landing systems has significantly improved the reliability and safety of air travel during adverse weather conditions. These systems use sophisticated sensors and automation to guide aircraft during landing.

Why It Matters Now

The implementation of CAT III landing systems is crucial for minimizing disruptions and ensuring the smooth operation of airports during the winter fog season.

Key Takeaways

  • Fog: Disrupts railway and airline operations
  • Railways: Uses fog lights and GPS systems
  • Airlines: Implement CAT III landing systems
  • CAT III: Allows landing in low visibility
  • Real-time weather updates: Essential for operations
  • Strategies: Minimize disruptions and ensure safety

During winter, dense fog in northern India causes significant disruptions to railway and airline operations. Railways use fog safety devices, such as fog lights and GPS-based systems, to improve visibility and ensure safe train operations. Airlines implement measures like CAT III landing systems, which allow aircraft to land in low visibility conditions.

Additionally, both railways and airlines rely on real-time weather updates and communication systems to manage schedules and inform passengers about delays. These strategies aim to minimize disruptions and maintain safe operations during the fog season.

Key Facts

1.

Fog: Disrupts railway and airline operations

2.

Railways: Uses fog lights and GPS systems

3.

Airlines: Implement CAT III landing systems

4.

Real-time weather updates: Essential for operations

UPSC Exam Angles

1.

GS Paper III: Infrastructure, Technology

2.

GS Paper I: Geography (Weather phenomena)

3.

Potential question types: Statement-based, analytical

Visual Insights

Winter Fog Impact Zones in India

Map showing the regions in India most affected by winter fog, leading to railway and airline disruptions. The markers indicate major cities and transport hubs experiencing significant delays.

Loading interactive map...

📍Delhi📍Uttar Pradesh📍Punjab📍Haryana📍Bihar

Practice Questions (MCQs)

1. Consider the following statements regarding the impact of winter fog on transportation: 1. Dense fog primarily affects northern India due to geographical and meteorological factors. 2. Railways primarily use CAT III landing systems to mitigate fog-related disruptions. 3. Real-time weather updates are crucial for both railways and airlines to manage schedules during fog season. Which of the statements given above is/are correct?

  • A.1 and 2 only
  • B.1 and 3 only
  • C.2 and 3 only
  • D.1, 2 and 3
Show Answer

Answer: B

Statement 2 is incorrect. Railways use fog safety devices like fog lights and GPS-based systems, not CAT III landing systems (which are for aviation). Statements 1 and 3 are correct.

2. Which of the following technologies is primarily used by airlines to facilitate landings in low visibility conditions caused by dense fog?

  • A.Fog lights
  • B.GPS-based navigation
  • C.CAT III landing systems
  • D.Real-time weather updates
Show Answer

Answer: C

CAT III landing systems are specifically designed for aircraft to land in very low visibility conditions, making them the primary technology used by airlines in dense fog.

3. Assertion (A): Dense fog in northern India during winter leads to significant disruptions in railway and airline operations. Reason (R): Reduced visibility impairs safe navigation and increases the risk of accidents for both modes of transport. In the context of the above statements, which one of the following is correct?

  • A.Both A and R are true and R is the correct explanation of A
  • B.Both A and R are true but R is NOT the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true
Show Answer

Answer: A

Both the assertion and the reason are true, and the reason correctly explains why dense fog causes disruptions in transportation.

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