Question 38
ONC05INTERNATIONAL ONLY Two power-driven vessels are meeting. What would a two-blast whistle signal by either vessel mean?
AI Explanation
The Correct Answer is A
Option A ("I am altering course to port") is correct because, according to the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 34(a)(ii), when power-driven vessels are in sight of one another, **two short blasts** means: "I am altering my course to port." The signal describes the action the vessel is currently taking or committing to take.
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**Why the other options are incorrect:**
* **Option B ("I desire to pass starboard to starboard"):** This phrasing refers to the desired outcome of the meeting situation, but it is not the meaning of the two-blast signal. While altering course to port would typically lead to a starboard-to-starboard passing, the signal strictly indicates the **action taken** (altering course to port).
* **Option C ("I desire to pass port-to-port"):** This is incorrect. Passing port-to-port generally involves the vessel altering course to starboard, which is indicated by **one short blast** ("I am altering my course to starboard").
* **Option D ("I intend to alter course to port"):** This is incorrect because, under the International Rules (COLREGs), the maneuvering signals (one short blast, two short blasts, three short blasts) are signals of **execution** ("I am altering course," "I am going astern"), not just intent or desire.