Logbook

An official record maintained aboard a vessel that documents the ship’s daily activities, including navigational data, weather conditions, and significant events.

A logbook, also known as a ship’s log or deck log, is a crucial document on any vessel, whether it be a commercial ship, naval vessel, or recreational boat. It serves as a comprehensive record of the ship’s operations and activities over time. Typically, the officer of the watch or a designated crew member is responsible for making regular entries into the deck log, often at the end of each watch or at specified intervals. These entries include essential navigational information such as the ship’s position, course, and speed, as well as meteorological data like wind direction, sea state, and temperature. Additionally, the deck log records significant occurrences such as crew changes, equipment malfunctions, drills, and any unusual events that may affect the vessel’s operation or safety.

The logbook is not only a legal document but also a historical record of the ship’s journey. In the event of an incident, such as a collision or mechanical failure, the deck log can serve as evidence to determine the sequence of events. It is also used for routine inspections and audits by maritime authorities. In some cases, the logbook may be required to be submitted to port authorities upon arrival or departure. Maintaining an accurate and up-to-date logbook is a fundamental responsibility aboard any vessel, ensuring transparency and accountability in maritime operations.