Coast Guard Exams

Question 28

MODU01

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"?

Diagram for question 28
AI Explanation
The Correct Answer is C ### Explanation for Option C (special flashing light) **The special flashing light is correct because it is a mandatory, identifying light displayed forward on power-driven vessels engaged in a common Inland River operation.** 1. **Inland Rules Mandate:** Under the Inland Navigation Rules (Rule 23(e)), a power-driven vessel pushing ahead or towing alongside on the Western Rivers (or waters specified by the Commandant) must display a **special flashing light**. 2. **Visibility and Purpose:** This light is amber, flashes 50–70 times per minute, and is placed forward. It is visible over a horizontal arc of 180–225 degrees, centered on the centerline, meaning it is specifically designed to be seen by vessels approaching head-on or slightly off the bow. 3. **Conclusion for Scenario:** Since the vessels are "INLAND ONLY" and meeting on a river, Vessel B is likely a towing vessel pushing a tow. If Vessel B is pushing, this special flashing light is displayed at the bow and would be clearly visible to Vessel A during the meeting situation. *** ### Explanation for Incorrect Options **A) yellow towing light** The yellow towing light (required under Rule 24 for towing astern) is a white or yellow light positioned vertically above the stern light and is visible only in the **stern sector (135 degrees astern)**. Since Vessel A and Vessel B are meeting, Vessel A is looking at Vessel B's bow. Therefore, Vessel A would not see the towing light. **B) red sidelight** While a red sidelight (port side) *may* be seen depending on the final angle of the passing maneuver, it is not a definite identifying light for a vessel meeting head-on (in which case, masthead lights and the special flashing light are primary). More importantly, the sighting of the sidelight depends entirely on A being slightly off B's port bow. The special flashing light (C) is mandatory for the operation and displayed in the forward sector, making it the definitive unique light visible during a meeting in this specific inland context. **D) All of the above** This option is incorrect because the yellow towing light (A) is not visible in a meeting situation.