Question 17

The Correct Answer is B **Explanation for Option B (Sidelights and a stern light):** This requirement is mandated by the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 24 (Towing and Pushing). Rule 24(h) states that a vessel being towed alongside shall exhibit the sidelights and a stern light. This set of lights ensures that the vessel being towed is clearly identified as a passive unit (no masthead light) and that its presence and extent are clearly visible to approaching vessels, particularly from ahead (via sidelights) and astern (via the stern light). **Explanation of Why Other Options Are Incorrect:** * **A) One all-round white light:** This light is generally reserved for very small power-driven vessels (less than 7 meters in length with a maximum speed of less than 7 knots) or is sometimes used to indicate an anchored vessel. It does not provide the necessary scope or aspect information required for a vessel being towed. * **C) A masthead light, sidelights, and a stern light:** This combination identifies a power-driven vessel underway (Rule 23). A vessel being towed alongside is not maneuvering under its own power and therefore shall not exhibit a masthead light. * **D) Only the outboard sidelight and a stern light:** Although the inboard sidelight would likely be obscured by the towing vessel, COLREG Rule 24 requires the towed vessel to exhibit its standard "sidelights and a stern light." The rules do not permit the removal or extinguishment of the inboard sidelight in this scenario.