How is a navigation chart typically oriented?

How is a navigation chart typically oriented?

• A. Magnetic North at the top
• B. True North at the top with a compass rose
• C. East at the top
• D. The chart orientation varies depending on the region

Answer: (B)

Charts are typically drawn with True North at the top, and they include a compass rose that shows both True North and Magnetic North along with the local magnetic variation. This keeps the latitude/longitude grid aligned to geographic coordinates, while the variation lets you convert between true bearings (used on the chart) and magnetic bearings (steered with a compass). In practice, you plot using true bearings on the chart, then apply the variation to obtain the magnetic bearing needed to steer, or reverse if you’re aligning a magnetic reading to a charted true course. Using magnetic north at the top would detach the chart from the geographic grid and vary with location and time, which is not standard. An East-at-the-top orientation would misalign the chart with the global coordinate system.

Charts are typically drawn with True North at the top, and they include a compass rose that shows both True North and Magnetic North along with the local magnetic variation. This keeps the latitude/longitude grid aligned to geographic coordinates, while the variation lets you convert between true bearings (used on the chart) and magnetic bearings (steered with a compass). In practice, you plot using true bearings on the chart, then apply the variation to obtain the magnetic bearing needed to steer, or reverse if you’re aligning a magnetic reading to a charted true course. Using magnetic north at the top would detach the chart from the geographic grid and vary with location and time, which is not standard. An East-at-the-top orientation would misalign the chart with the global coordinate system.