Which tools are commonly utilized for measuring magnetic variation?

Magnetic variation, which is the difference between magnetic north and true north, is primarily measured using magnetic compasses and GPS systems.

Magnetic compasses are traditional tools that respond to the Earth's magnetic field, allowing pilots and navigators to determine their heading relative to magnetic north. They are fundamental in aviation navigation, particularly in areas where GPS signal may be weak or unavailable.

GPS systems contribute by providing precise positioning information based on satellite data, which includes calculations that take into account the magnetic variation in the area. This integration helps pilots correct their course based on the true north reference they receive from the GPS.

Other tools listed, like barometers and altimeters, are primarily used for measuring atmospheric pressure and altitude, while pressure gauges and accelerometers serve different functions related to aircraft performance and dynamics. Flight computers and weather radar support navigation but are not specifically focused on measuring magnetic variation. Thus, the combination of magnetic compasses and GPS systems effectively addresses the need for accurate heading information in aviation navigation concerning magnetic variation.