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How should a pilot establish contact with an En Route Flight Advisory Service (EFAS) station?

  1. By sending an email to the flight service

  2. Through a phone call to the nearest FSS

  3. Calling Flight Watch on 122.0

  4. Using an online weather service

The correct answer is: Calling Flight Watch on 122.0

Establishing contact with an En Route Flight Advisory Service (EFAS) station is effectively done by calling Flight Watch on the designated frequency of 122.0 MHz. This frequency is specifically assigned for pilots to receive real-time weather updates and other pertinent information during their flight. The EFAS services enable pilots to communicate directly with flight service personnel who can provide valuable assistance, including updates on weather conditions, notices to airmen, and other en route information. By using Flight Watch, pilots are utilizing a conventional and established means of communication designed for in-flight advisory services. This method ensures that pilots receive immediate assistance and can make informed decisions based on the latest data available. Other methods like emails, phone calls to the nearest FSS, or using online weather services do not provide the immediate interaction and situational awareness needed while airborne, making them less suitable for real-time en-route consultations.