You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?

Correct Answer: Option A — The contact is on the same course and speed as your vessel.

Relative motion is the vector difference between two vessels. If a contact remains stationary on the PPI, its relative motion is zero. This occurs only when the target vessel is maintaining an identical course and speed to your own, resulting in a constant bearing and range.