Private Pilot Private Exam

What initial indication does the magnetic compass provide when a left turn is performed from a north heading in the Northern Hemisphere?

1. A turn toward the south

2. A turn toward the east

3. A turn toward the west

4. A turn toward the north

The correct answer is: A turn toward the east

When a left turn is made from a north heading in the Northern Hemisphere, the magnetic compass initially indicates a turn toward the east due to the principles of magnetic compass operation and the behavior of the magnetic field. As the aircraft begins to turn left, the compass, which is influenced by the Earth's magnetic field, experiences a phenomenon known as "magnetic dip." During a turn, the compass tends to lag behind the actual heading because it is still aligned with the magnetic north from the original heading. As a result, in the Northern Hemisphere, when you initiate a left turn from north, the compass will initially show a turn toward the east before correctly indicating the new heading. This behavior is crucial for pilots to understand, as misinterpretation of the compass during turns can lead to navigational errors. Understanding this concept allows pilots to interpret compass readings accurately and adjust their flying to maintain the correct heading. This knowledge is essential for safe and effective navigation, particularly in conditions where reliance on instruments is critical.