Question 1825 Deck General

The correct answer is A) The vessel's official number. According to regulations governing documented small passenger vessels, the vessel's official number must be permanently affixed in block-type letters and/or numerals to the main beam or other clearly visible interior structural part of the hull. This requirement ensures the vessel's unique identification number is readily available for inspection and record-keeping purposes. The other options are incorrect because they do not represent the specific regulatory requirement for displaying the official number on the vessel's interior structure. Draft markings, the vessel's name and home port, and the vessel's name and gross tonnage, while important information, are not the mandatory identification number that must be permanently affixed per the regulations.