According to the 1-2-3 rule, when should you check the weather conditions?

The correct answer emphasizes the importance of checking weather conditions both before and after the estimated time of arrival (ETA) at your destination. The 1-2-3 rule advocates for thoroughness in planning and safety, as weather conditions can change rapidly. By checking the weather one hour before and one hour after ETA, travelers ensure they are aware of any adverse weather conditions that may affect their flight or travel plans, allowing them to make informed decisions regarding safety and schedule adjustments as necessary.

This approach is particularly important for logistics and safety reasons, ensuring not only that the journey is started under favorable conditions but also that potential weather issues upon arrival are taken into account, which can impact operations, passenger safety, and overall travel continuity.