How is surge rate calculated based on a change in speed?

The surge rate is a critical factor in understanding how changes in speed affect motion on the water. To calculate the surge rate effectively, you need to consider the relationship between speed changes and the resulting distance traveled.

The correct calculation method works by correlating the change in speed to a specific distance. In this context, the formula that applies is the one that multiplies the change of speed by 25 yards. This figure is likely derived from practical measurements or established rules of thumb in marine navigation that reflect typical surge behavior.

When a vessel increases or decreases its speed, the surge rate is a reflection of how far the vessel will move in response to that speed change. By using the factor of 25 yards, it provides a pragmatic approach to estimate the distance associated with a unit change in speed, which can aid in navigating and making strategic decisions on the water.

The choice that involves 25 yards effectively captures a common approximation in maritime practice, making it a reliable standard for such calculations.