In the navigation rules what is the duty of a stand on boat?

In navigation rules, the stand-on vessel is the one that must maintain its course and speed when encountering another vessel. It is typically the boat with the right of way, meaning it should not take evasive action unless it becomes clear that the give-way vessel is not taking appropriate measures to avoid a collision. The stand-on vessel should monitor the situation and be prepared to act if necessary, prioritizing safety.