Question 26 MODU02 - Barge Supervisor

The Correct Answer is D ### **Explanation of Correct Option (D)** **D) An all-round white light may be carried in lieu of the second masthead light and stern light.** This statement is correct based on the specific Inland Rules modifications for the Great Lakes. **Inland Rule 23(e)** states that a power-driven vessel that is less than 20 meters in length and operating on the Great Lakes may carry a single all-round white light in place of the second (range) masthead light and the separate stern light. This modification simplifies lighting requirements for smaller vessels operating in this region. *** ### **Explanation of Incorrect Options** **A) Great Lakes vessels are exempted from the requirement to show yellow towing lights.** * **Why it is Incorrect:** There is no Inland Rule exemption for Great Lakes vessels regarding towing lights. Any vessel engaged in towing (other than pushing ahead or alongside, which utilizes standard masthead lights) must display the required yellow towing lights above the stern light as per Inland Rule 24. **B) Sidelights for vessels over 50 meters are required to have only a two-mile range of visibility.** * **Why it is Incorrect:** According to Annex I, Section 9(a), for power-driven vessels 50 meters or more in length, the sidelights are required to have a minimum range of visibility of **3 miles**. The two-mile visibility requirement applies only to vessels between 12 meters and 50 meters in length. **C) The showing of a forward masthead light is optional for vessels under 150 meters.** * **Why it is Incorrect:** The forward masthead light is *mandatory* for all power-driven vessels underway, regardless of location (unless the vessel is under 12 meters, in which case a single all-round white light can substitute). The length of the vessel determines the position and required visibility of the forward masthead light, but not whether it is optional. Rule 23 requires a forward masthead light for all vessels over 12 meters in length.