You are approaching another vessel. She is about one mile distant and is on your starboard bow. You believe she will cross ahead of you. She then sounds a danger signal of five short blasts. You should __________.

When you encounter another vessel that sounds a danger signal, which typically consists of five short blasts, it indicates that the other vessel is uncertain of your intentions or perceives a risk of collision. In this scenario, since the other vessel is on your starboard bow and you think she will cross ahead of you, the appropriate response is to make a significant course change and, if necessary, reduce your speed.

Making a large course change helps to clearly communicate your intentions to the other vessel and increases safety by ensuring that the vessels will not collide. This action allows you to avoid any potential danger and gives the other vessel adequate space to maneuver. Slowing down, if required, can further allow for safer navigation and give both vessels time to assess the situation.

Maintaining your course and speed, or only slightly reducing speed, does not effectively communicate your intentions or ensure safety in this scenario where a danger signal has been issued. Waiting for another signal might lead to further confusion and could increase the risk of collision. Hence, the correct course of action in this situation prioritizes safety and communication on the water.