What is the term for magnetic variation that is east of true north?

When magnetic variation is east of true north, it means that the magnetic north direction is rotated eastward from the true north. This is commonly referred to as easterly variation. In aviation and navigation, understanding the relationship between true north, magnetic north, and magnetic variation is essential for accurately determining headings and courses.

This specific term is used because it indicates the angular difference between true north (the geographic North Pole) and magnetic north (the direction a magnetic compass points), where the magnetic north is located to the east of true north. This concept is important for pilots and navigators, as they need to correct their magnetic headings based on the magnetic variation in their area to ensure correct navigation.

Easterly variation indicates that pilots will need to add this variation to their true heading to convert it to a magnetic heading, ensuring they stay on course. Understanding this relationship enhances navigational accuracy, particularly in areas where the magnetic field is significantly different from the true geographic orientation.