New Zealand CPL Meteorology (MET) Practice Exam 2025 - Free Meteorology Practice Questions and Study Guide

Question: 1 / 400

How long are SIGMETs valid for, except in specific cases like volcanic ash or tropical cyclones?

2 hours

4 hours

SIGMETs, which are significant meteorological information warnings, are generally valid for four hours. This validity period is established to provide timely and relevant information to pilots and aviation personnel about potentially hazardous weather conditions such as severe turbulence, thunderstorms, or icing that could impact flight safety.

While SIGMETs for volcanic ash or tropical cyclones may have different validity periods due to their specific nature and potential for longer-lasting effects, the standard for most SIGMETs is indeed four hours. This timeframe allows for necessary updates and timely dissemination of information while ensuring that pilots are aware of transient hazards during their flights. Understanding the validity period of SIGMETs is crucial for flight planning and in-flight decision-making.

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6 hours

12 hours

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