Question 3725 Deck General

The correct answer is B) The crane record book. After a report of casualty to a mobile offshore drilling unit, the crane record book must be kept on board. This is because mobile offshore drilling units use cranes extensively for various operations, and any incident or casualty involving the crane must be properly documented in the crane record book. This requirement is typically mandated by the relevant regulations or safety standards governing the operation of mobile offshore drilling units. The other options are incorrect because they do not specifically pertain to the records that must be kept after a casualty incident on a mobile offshore drilling unit. The Oil Record Book is used to document oil-related operations, the machinery maintenance logbook is for recording maintenance activities, and chart catalogs are not directly related to casualty reporting.