Which statement about chart scales is true?

• A. Large scale means less detail
• B. Large scale means a larger geographic area with more detail
• C. Small scale means more detail
• D. Large scale means more detail and a smaller area

Answer: (D)

Chart scale shows how distances on the chart relate to real-world distances. A large-scale chart represents a small area in much greater detail, so it provides more detail over a limited geographic extent. Conversely, a small-scale chart covers a large area but with less detail. So the statement that large scale means more detail and a smaller area is true. This is why mariners use large-scale charts for close-in work like harbor approaches and pilotage, while small-scale charts are better for planning across oceans.