Question 13 GLI08 - Limited OUPV

The Correct Answer is C **Explanation for C (Either vessel) being correct:** The signal described – at least five short and rapid blasts of the whistle – is defined in both the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Rules (specifically 33 CFR 83.34(d)). This signal is used to indicate doubt or uncertainty regarding the intentions or actions of another vessel, or to indicate that a vessel does not agree with the proposed maneuver of the other vessel. Rule 34(d) (inland) and Rule 34(d) (international) state: "When vessels in sight of one another are approaching each other and from any cause either vessel fails to understand the intentions or actions of the other, or is in doubt whether sufficient action is being taken by the other to avoid collision, the vessel in doubt shall immediately indicate such doubt by giving at least five short and rapid blasts on the whistle." Crucially, the rule uses the language "**either vessel** fails to understand" and specifies that "**the vessel in doubt** shall immediately indicate such doubt." This provision applies equally to the vessel designated as the stand-on vessel and the vessel designated as the give-way vessel in a crossing situation, or any vessel in any close-quarters situation where doubt arises. **Explanation of why other options are incorrect:** * **A) The give-way vessel:** While the give-way vessel may certainly use this signal if it is confused or unsure about the stand-on vessel's actions (e.g., if the stand-on vessel appears to be maneuvering unexpectedly), the use of the signal is not restricted only to the give-way vessel. * **B) Neither vessel:** This is incorrect because the Rule explicitly permits the use of the signal by any vessel that is in doubt about the situation. * **D) The stand-on vessel:** While the stand-on vessel may certainly use this signal if it is confused or unsure about the give-way vessel's actions (e.g., if the give-way vessel appears not to be taking appropriate avoiding action), the use of the signal is not restricted only to the stand-on vessel. Both vessels have the right and duty to indicate confusion or doubt using this signal.