If the speed changes by 2 knots, what is the surge distance?

In the context of nautical navigation, surge distance refers to the distance a vessel will travel as it accelerates or decelerates. When calculating surge distance due to a change in speed, it's important to consider the time it takes for the vessel to reach the new speed and how that correlates with the change in velocity.

The common formula used to determine surge distance due to a speed change incorporates the average speed during the acceleration phase. In the scenario where the speed of a vessel changes by 2 knots, it's typically understood that this speed change occurs over a short time frame, creating a distance over which the vessel continues moving as it accelerates.

The correct answer, which is 25 yards in this case, can be derived from typical surge distance calculations used in maritime contexts. Generally, a speed change of 2 knots under normal operational conditions will yield a relatively short surge distance, and 25 yards aligns with standard calculations considering factors like vessel handling characteristics and environmental conditions.

Thus, the answer indicates an understanding of how speed changes influence vessel dynamics and the resulting distances traveled during those transitions. In practical navigation scenarios, maintaining awareness of surge distance is vital for ensuring safe maneuvering, especially near obstacles or in confined channels.