In navigational terms, what is another name for a line of constant bearing?

• A. Great circle
• B. Rhumb line
• C. Straight line
• D. Curved path

Answer: (B)

A line of constant bearing is referred to as a rhumb line in navigational terms. This type of line intersects all meridians at the same angle, maintaining a constant compass direction over the earth's surface. This is particularly useful for navigation because it allows sailors and aviators to follow a straight course without having to frequently adjust for changes in direction resulting from the curvature of the earth.

In contrast, a great circle represents the shortest distance between two points on a sphere and varies in bearing as one travels along it. A straight line suggests a simplistic, two-dimensional approach that does not accommodate the spherical nature of the earth, while a curved path implies variability in direction and does not align with the principles of constant bearing. Therefore, rhumb lines are critical for navigation because they enable consistent course tracking over long distances.