Which diagram represents the difference between grid and magnetic North?

The diagram that represents the difference between grid and magnetic North is commonly referred to as declination. This is essential for navigators because it indicates the angle difference between true North (or grid North) and magnetic North. Understanding this declination is crucial for accurate navigation, particularly when using a compass in conjunction with a map. A depiction of declination shows how much magnetic North deviates from grid North at a specific location, allowing navigators to adjust their bearings accordingly.

In practice, declination is expressed in degrees and can help in correcting compass readings to align them with true North. For example, if you are at a location where magnetic North is 5 degrees east of true North, you would need to adjust your compass readings by this amount to maintain an accurate course when navigating. This is a fundamental concept in navigation, ensuring that users can remain oriented in a variety of environments, whether on land or at sea.