Question 20 GLI08 - Limited OUPV

The Correct Answer is D **Explanation for Option D (Correct Answer):** Inland Rule 34(a)(i) of the U.S. Inland Navigation Rules governs whistle signals when vessels are in sight of one another and meeting or crossing. Specifically for **Inland Waters**, a vessel signaling with **one short blast** signifies an **intent** regarding the passing arrangement: > Rule 34(a)(i): "When power-driven vessels are in sight of one another and meeting or crossing at a distance within half a mile, each vessel underway, when maneuvering as authorized or required by these Rules, shall indicate that maneuver by the following signals on her whistle: **one short blast to mean 'I intend to leave you on my port side'**..." Since the stand-on vessel is initiating the signal (in a crossing situation, the stand-on vessel holds course and speed unless risk of collision dictates otherwise, but signaling is often used to confirm intentions or propose an alternative maneuver in Inland waters), the one short blast explicitly communicates the intent to pass the other vessel such that the other vessel will remain on the signaling vessel's port side. **Explanation of Incorrect Options:** * **A) is changing course to port:** In Inland Rules, changing course to port is communicated by **two short blasts** ("I intend to leave you on my starboard side"). One short blast indicates passing port-to-port, which often involves maintaining course or making a slight adjustment to starboard, not turning to port. * **B) is changing course to starboard:** While leaving another vessel on the port side (one short blast) is the standard port-to-port passing arrangement and may sometimes involve a slight turn to starboard, the whistle signal itself (one short blast) means "I intend to leave you on my port side," not "I am changing course to starboard." The signal is an intention regarding passing side, not necessarily a declaration of an immediate course change (which is why options A and B are used for turns, but D is used for passing intention). * **C) intends to hold course and speed:** While the stand-on vessel primarily holds course and speed in a crossing situation, the standard signal for holding course and speed *without* proposing a passing arrangement is generally not one short blast. Furthermore, the explicit definition of one short blast in Inland waters is "I intend to leave you on my port side," which is a statement of passing intention, not just a declaration of maintaining status quo. (Note: Under International Rules (COLREGs), one short blast signifies "I am altering my course to starboard," which is a maneuver, not an intent to pass on the port side, highlighting the crucial difference between Inland and International interpretations.)