Which of the following is one of the responsibilities of a Deck Watch Officer?

One of the key responsibilities of a Deck Watch Officer is to enforce the Commanding Officer's standing orders. This role involves ensuring that established protocols and directives are followed by the crew during operations. The Deck Watch Officer acts as a critical link in the chain of command, ensuring that the Commanding Officer's intended operational posture and safety measures are adhered to while on watch. This responsibility is vital for maintaining the safety and efficiency of the vessel and its crew, as it promotes consistency in procedures and adherence to established guidelines.

In contrast, scheduling crew training sessions, managing the vessel's supply inventory, and conducting maintenance on life jackets typically fall under the purview of different roles within the crew, such as the training officer or the supply officer. These tasks are essential for the overall operation and safety of the vessel but are not specific duties of the Deck Watch Officer. The focus of the Deck Watch Officer is primarily on the direct oversight of watchstanding duties and the implementation of the Commanding Officer's directives.