Question 13 ONC04 - Mate of LT 500-1600 GRT

The Correct Answer is A. **Explanation for Option A (Correct):** Option A states: "Slow to minimum to maintain course and navigate with caution." This action is required by the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 19(e) – Conduct of vessels in restricted visibility. Rule 19(e) mandates that if a vessel hears the fog signal of an apparently approaching vessel that is forward of the beam, or if close quarters cannot be avoided, the vessel must take immediate action. This action includes reducing speed to the minimum at which the vessel can be kept on her course and navigating with extreme caution until the danger of collision is over. **Explanation for Other Options (Incorrect):** * **B) Slow to moderate speed and navigate with caution:** COLREGs Rule 19(e) requires reducing speed to the *minimum* necessary to maintain steerage, not a "moderate" speed, which implies a higher speed than the absolute minimum and might be too fast to stop in time. * **C) Stop engines and navigate with caution:** While stopping engines might be a secondary maneuver if the vessel needs to hold position, the primary mandatory action under Rule 19(e) is to reduce speed to the minimum maintainable speed and keep course, not necessarily to stop engines entirely (which would lead to loss of steerage way). * **D) Maintain speed and sound five short and rapid blasts:** Maintaining speed in restricted visibility when a risk of collision exists is strictly prohibited by Rule 19(e). Sounding five short and rapid blasts is the danger signal (Rule 34(d)), used to indicate that the vessel cannot understand the other vessel's intentions or doubts whether sufficient action has been taken—it is not the required initial action when hearing a fog signal ahead.