Question 15 UFV01 - Master - Uninspected Fishing Vessels

BOTH INTERNATIONAL & INLAND Which vessel is the stand-on vessel when two vessels crossing in fog are NOT in sight of one another?

A Neither vessel is the stand-on vessel.
B The vessel which hears the other vessel's fog signal first
C The vessel which has the other on her own starboard side
D The vessel which has the other on her own port side
AI Explanation

The Correct Answer is A ### Explanation for A (Correct Option) **Neither vessel is the stand-on vessel** when two power-driven vessels crossing in fog are not in sight of one another. This scenario is governed by Rule 19 (Conduct of vessels in restricted visibility) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and Inland Rules. Rule 19 takes precedence over the steering and sailing rules (like Rule 15 for crossing situations) when visibility is restricted and vessels are detected by radar or hearing fog signals but are not yet in sight. Rule 19(d) requires that any vessel hearing a fog signal forward of the beam, which by risk of collision is not yet relieved, must reduce her speed to bare steerageway or, if necessary, take all way off. If she determines that a close-quarters situation is developing, she **must take timely and substantial action, which may include stopping or reversing her propulsion**. Rule 19 is a **precautionary rule** that imposes equivalent duties on all vessels to avoid collision; it does **not** assign a stand-on/give-way relationship. Both vessels must take action to avoid collision. *** ### Explanation of Incorrect Options * **B) The vessel which hears the other vessel's fog signal first:** Rule 19 requires both vessels to take precautions upon hearing a signal forward of the beam. The timing of when the signal is first heard does not assign stand-on status. * **C) The vessel which has the other on her own starboard side:** This statement describes the normal crossing rule (Rule 15), which designates the vessel on the port side as the give-way vessel and the vessel on the starboard side as the stand-on vessel. However, Rule 19 explicitly supersedes Rule 15 when vessels are not in sight of one another in restricted visibility. The traditional stand-on/give-way rules only apply when vessels are in sight of one another. * **D) The vessel which has the other on her own port side:** This vessel would typically be the give-way vessel under Rule 15 (as she has the other vessel on her starboard side). However, because Rule 19 applies, both vessels are required to act, and neither is the stand-on vessel.

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