Question 46 RVR04 - Master or Mate of LT 200 GRT

The Correct Answer is A Option A ("The vessel's lights must comply as closely as possible.") is correct because it directly reflects Rule 2(b)(i) of the Inland Rules, which provides for special exemptions for certain vessels determined by the Secretary to be unable to comply with the rules. Specifically, for vessels determined to be unable to comply with the spacing requirement for masthead lights or side and stern lights, the requirement is that the vessel's lights shall comply as closely as possible with the requirements of these Rules. **Why the other options are incorrect:** * **B) The vessel must be altered to permit full compliance with the rules.** This is incorrect. If the Secretary has already determined that the vessel *cannot* comply (usually due to structural constraints or unique design), requiring a costly or impossible alteration contradicts the intent of the special exemption provided by Rule 2(b)(i). * **C) An all-round light should be substituted for the after-masthead light and the stern light.** This describes an alternative lighting arrangement permitted for specific types of vessels (like power-driven vessels less than 12 meters in length), but it is not the specific relief granted under Rule 2(b)(i) for a vessel that cannot meet masthead light *spacing requirements*. * **D) The vessel must carry only the lights that comply with the rules; the others may be omitted.** This is incorrect. Rule 2(b)(i) does not allow for the omission of required lights; instead, it mandates that the lights must comply "as closely as possible," ensuring the vessel still displays the required visibility and signaling characteristics, even if the spacing is slightly off.