If you are approaching another vessel and will pass starboard to starboard without danger, what should you do?

When approaching another vessel and passing starboard to starboard, the correct action is to hold your course and sound no whistle signal. This situation is based on the rules of navigation, which state that when two power-driven vessels are meeting head-on, they should each alter course to starboard to pass safely. Since you're already set to pass starboard to starboard without any immediate risk, maintaining your course ensures predictable movements for both vessels, contributing to safe navigation.

It's important to remember that sounding a whistle signal is typically required in situations where there's a need to communicate intentions or alert other vessels of potential conflicts. However, since you are both on a safe course, there is no requirement for a sound signal, and doing so could unnecessarily complicate the situation.

Furthermore, altering course to port, reducing speed significantly, or sounding a prolonged whistle could create confusion or instability in both vessels' maneuvers, which is why maintaining your current course is the best choice.