Which person is responsible for maintaining the deck log while the ship is underway?

The Quartermaster of the Watch is responsible for maintaining the deck log while the ship is underway. This role involves documenting significant events related to the ship’s navigation, course changes, and other operational activities that occur during the watch. The deck log serves as a historical record of the ship's activity and is crucial for accountability and operational continuity.

The Officer of the Deck has overall responsibility for the ship’s operation and safety when on watch but does not typically handle the recording of the data in the deck log. Instead, they rely on the Quartermaster to ensure that all necessary entries are accurately made. The Ship's Captain oversees the entire crew and operations of the ship, but responsibility for the deck log is delegated to the Quartermaster. The Combat Information Center Watch Officer focuses primarily on battle management and situational awareness rather than navigation logs.