A collision could occur when the distance decreases and the bearing between two vessels does what?

When the distance between two vessels decreases, and the bearing between them stays the same, it indicates that the vessels are on a collision course. The bearing refers to the angle or direction from one vessel to another. If the bearing is constant, while the distance is diminishing, it means that both vessels are moving towards each other in a straight line. This situation requires immediate attention and action to avoid a collision, emphasizing the importance of understanding vessel positions and their movements on the water.

In contrast, when the bearing changes direction, it could signify that the vessels are altering their relative paths, potentially avoiding a collision. An increasing distance indicates that the vessels are moving apart, which would also help in avoiding a collision. The term "resets" is not relevant in this context and does not apply to the dynamics of vessel movement concerning collision avoidance.