Question 28 ONC05 - Master or Mate of LT 200 GRT
INLAND ONLY Vessels "A" and "B" are meeting on a river as shown in illustration D041RR below and will pass 1/4 mile apart. Which is one of the lights on vessel "B" that you will see if you are on vessel "A"?
The Correct Answer is C ### 2. Explanation for Option C (special flashing light) Option C, the **special flashing light**, is correct because of its specific role under the U.S. Inland Navigation Rules (33 CFR Subchapter E). 1. **Purpose:** This light is mandatory for a power-driven vessel (like Vessel B) engaged in the specific Inland operation of pushing a tow ahead or towing alongside, provided the vessels are **rigidly connected** (forming a composite unit) and certain size limits are met (tow length under 200 meters). 2. **Location and Visibility:** The special flashing light is displayed on the **forward end of the tow** (the lead barge). Crucially, this light is visible all around the horizon (360 degrees). 3. **Conclusion:** Since Vessel A is approaching Vessel B (a meeting situation), Vessel A will be positioned ahead of Vessel B. If Vessel B is configured as an Inland rigid tow, Vessel A will see the 360-degree special flashing light displayed on the forward part of the tow. ### 3. Explanation of Incorrect Options **A) yellow towing light:** This light is placed on the towing vessel and covers an arc of 135 degrees visible only from the **stern** of the vessel. Since Vessel A is meeting Vessel B (approaching from ahead or nearly ahead), Vessel A will not be able to see a light designed for vessels approaching from astern. **B) red sidelight:** A red sidelight covers the port side (112.5 degrees forward). In a meeting situation, vessels typically pass port-to-port. If Vessel B is passing A port-to-port, A will see B's **red** sidelight. However, if they execute a starboard-to-starboard passing (which is allowed if agreed upon, especially on a narrow river), Vessel A would see Vessel B's **green** sidelight. Since the passing agreement is not specified, we cannot definitively say that Vessel A *will* see the red sidelight. **D) All of the above:** Since the yellow towing light (A) is definitely incorrect, this option is also incorrect.
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