Question 63 OSV01 - Master/Chief Mate - Offshore Supply Vessels

The Correct Answer is D **Why option D ("Drafts upon leaving port") is correct:** The requirements for what must be entered into the Official Logbook (OLB) are stipulated by national maritime law (e.g., 46 U.S. Code § 11301 and associated regulations). An essential component of the safety and operational record of a vessel is its stability and loading condition. Therefore, the vessel's drafts (forward, aft, and sometimes amidships) upon leaving port, which indicate its loading depth and trim, are mandatory entries in the Official Logbook. **Why the other options are incorrect:** * **A) Names of night mates and engineers:** While names of officers on watch and the engineering staff are crucial operational details and are logged in the Deck Log or Engine Log (Chief Engineer's Log), the complete daily rotation and individual names of watch standers are generally not required to be transcribed into the summary document that is the Official Logbook, unless they pertain to an official change in command or crew complement. * **B) Number of cargo gangs on board:** This is a routine operational detail relevant to port safety, security, and stevedoring costs. It is recorded in the Deck Log, but it is not a statutorily required entry for the Official Logbook, which focuses on statutory events, incidents, and required vessel data. * **C) All engine orders:** Every individual engine order (e.g., "slow ahead," "stop," "half astern") is recorded in real-time in the Bell Book and/or the Engine Log (ER Log). The Official Logbook only requires summary entries regarding significant operational activities (like pilotage start/end or major maneuvering events) but does not require the inclusion of every individual bell movement.