In the navigation rules what must stand on boats do?

In navigation rules, "stand-on" vessels are required to maintain their course and speed when encountering a "give-way" vessel. The stand-on vessel must not take evasive action unless it becomes apparent that the give-way vessel is not taking appropriate measures to avoid a collision. This rule helps ensure predictability in navigation and reduces the risk of accidents at sea. However, safety is always the priority, and if a collision seems imminent, the stand-on vessel should take necessary action to avoid it.