What best describes a rhumb line on a Mercator chart?

• A. A rhumb line is a line of changing bearing; on Mercator it curves.
• B. A rhumb line is a line of constant bearing; on Mercator it appears as a straight line, simplifying plotting.
• C. A rhumb line is the shortest route between two points on the sphere.
• D. A rhumb line is a small circle of constant latitude.

Answer: (B)