The correct answer is D) deck rough log. The deck rough log is the journal kept by the officer of the watch that records day-to-day happenings regarding the deck department. This log serves as a detailed record of the vessel's operations, including weather conditions, events, and activities on the deck. The other options are incorrect because: A) The official logbook is a more formal, required record of the ship's voyage; B) The cargo record book is used to document cargo-related activities; and C) The bell book records the times that the ship's bell is struck, which is not the same as a record of deck department activities.