What are agonic lines?

What are agonic lines?

• A. Lines of equal airspeed
• B. Points of zero variation
• C. Lines of maximum wind influence
• D. Routes that require no navigation aid

Answer: (B)

Agonic lines are defined as the lines on a map where there is zero magnetic variation. Magnetic variation, which is the angle between magnetic north and true north, is vital for pilots and navigators as it affects the heading that an aircraft must fly to reach its intended destination accurately. Understanding agonic lines is crucial for ensuring that the magnetic headings used during flight planning and operation are adjusted correctly to account for any differences between true and magnetic north. While the other options discuss various navigational concepts, they do not relate to the specific nature of agonic lines. For example, lines of equal airspeed, maximum wind influence, and routes that require no navigation aid are distinct concepts that pertain to different aspects of aviation navigation and do not focus on the magnetic characteristics that define agonic lines. Thus, recognizing agonic lines as points of zero variation helps navigators and pilots make informed decisions based on magnetic headings.

Agonic lines are defined as the lines on a map where there is zero magnetic variation. Magnetic variation, which is the angle between magnetic north and true north, is vital for pilots and navigators as it affects the heading that an aircraft must fly to reach its intended destination accurately. Understanding agonic lines is crucial for ensuring that the magnetic headings used during flight planning and operation are adjusted correctly to account for any differences between true and magnetic north.

While the other options discuss various navigational concepts, they do not relate to the specific nature of agonic lines. For example, lines of equal airspeed, maximum wind influence, and routes that require no navigation aid are distinct concepts that pertain to different aspects of aviation navigation and do not focus on the magnetic characteristics that define agonic lines. Thus, recognizing agonic lines as points of zero variation helps navigators and pilots make informed decisions based on magnetic headings.