What is the altitude range for En Route Flight Advisory Service availability?

What is the altitude range for En Route Flight Advisory Service availability?

• A. Below 5,000 MSL
• B. 5,000 to 17,500 MSL
• C. Above 17,500 MSL
• D. All altitudes

Answer: (B)

The altitude range for En Route Flight Advisory Service (EFAS) availability is specifically designated for aircraft flying between 5,000 and 17,500 feet MSL (Mean Sea Level). This service is intended to provide pilots with timely information regarding meteorological conditions, as well as other pertinent data during their flight in controlled or uncontrolled airspace. At altitudes below 5,000 feet MSL, communication with EFAS could be limited due to the close proximity to terrain and air traffic. Above 17,500 feet MSL, different services come into play, including air traffic control-managed communication, which may not involve the same type of advisory services provided by EFAS. Therefore, the targeted range for EFAS ensures that pilots receive critical updates in more common flying altitudes while allowing for a structured environment that enhances safety and situational awareness.

The altitude range for En Route Flight Advisory Service (EFAS) availability is specifically designated for aircraft flying between 5,000 and 17,500 feet MSL (Mean Sea Level). This service is intended to provide pilots with timely information regarding meteorological conditions, as well as other pertinent data during their flight in controlled or uncontrolled airspace.

At altitudes below 5,000 feet MSL, communication with EFAS could be limited due to the close proximity to terrain and air traffic. Above 17,500 feet MSL, different services come into play, including air traffic control-managed communication, which may not involve the same type of advisory services provided by EFAS. Therefore, the targeted range for EFAS ensures that pilots receive critical updates in more common flying altitudes while allowing for a structured environment that enhances safety and situational awareness.