Question 15 MODU02 - Barge Supervisor

The Correct Answer is A ### Explanation for A (Correct) Option A ("Neither vessel is the stand-on vessel.") is correct because when two power-driven vessels are crossing in restricted visibility (fog) and hear the fog signal of the other vessel apparently forward of the beam, but are **not yet in sight of one another**, the **Crossing Rule (Rule 17)** does not apply. According to **COLREG Rule 19 (Conduct of vessels in restricted visibility)**, specifically Rule 19(d)(i) and 19(e): 1. **Rule 19(d)(i)** mandates that a vessel hearing a fog signal apparently forward of the beam must reduce her speed to the minimum steerageway, and if necessary, take all way off. 2. **Rule 19(e)** requires any alteration of course and/or speed to be avoided until the vessels are in sight of one another. In restricted visibility, the concept of "stand-on" and "give-way" vessels inherent in the **Rules of the Road (Rules 11-18)** is generally suspended when vessels are not in sight. Both vessels are considered to be in a situation of **risk of collision in restricted visibility**, and both must take appropriate precautionary action (slowing down, avoiding major maneuvers) until the visibility improves or the situation is clarified. Therefore, neither vessel has the right-of-way. ### Explanation for Other Options (Incorrect) **B) The vessel which hears the other vessel's fog signal first** The timing of hearing a fog signal is irrelevant to determining navigational status (stand-on or give-way) under COLREG. This timing relates purely to the practical detection of the other vessel, but does not grant navigational precedence. **C) The vessel which has the other on her own starboard side** This is the condition that determines the **give-way** vessel under the **Crossing Rule (Rule 15)**, which applies only when vessels are in sight of one another. The vessel that has the other on her own starboard side is the **give-way vessel** (required to keep clear), not the stand-on vessel. Furthermore, Rule 15 does not apply until the vessels are in sight. **D) The vessel which has the other on her own port side** This is the condition that determines the **stand-on** vessel under the **Crossing Rule (Rule 15)**, which applies only when vessels are in sight of one another. Since the vessels are crossing in fog and not in sight, Rule 15 is inapplicable. Therefore, this condition does not establish the stand-on vessel in this specific scenario.