What essential information does the Engineering Bell Book contain?

The Engineering Bell Book is a critical log maintained in the engine room of a ship that records specific operational information related to the engine and propulsion systems. One of its primary purposes is to document changes in the ship's speed and the orders regarding propeller RPM. This information is essential for tracking the ship's performance, managing fuel efficiency, and coordinating with navigational orders.

The entries in the Engineering Bell Book ensure that there is an accurate history of operational changes, which can be reviewed for safety audits, operational assessments, and even legal purposes in the event of an incident. The systematic recording of such commands provides a valuable reference for engineers and operational staff, facilitating effective communication and execution of orders related to the vessel’s maneuvering capabilities.

While other choices might involve important operations aboard a ship, they do not pertain to the specific and primary function of this logging book, which is focused on the performance and control of the propulsion machinery.