BOTH INTERNATIONAL & INLAND While underway in fog, you hear the fog signal of another vessel ahead. If a risk of collision exists, which action is required by the Rules?

Correct Answer: Option B — slow to bare steerageway and navigate with caution

Rule 19(e) requires every vessel that hears the fog signal of another vessel apparently forward of her beam to reduce her speed to the minimum at which she can be kept on her course. If necessary, she must take all her way off and navigate with extreme caution.