Aviation Standard Test Battery-E (ASTB E) Practice Test 2025 – All-in-One Guide to Mastering Your Aviation Exam!

The First Lieutenant aboard a ship primarily oversees the deck department or division, which is critical for the overall operation of the vessel. This role involves managing the day-to-day activities related to navigation, watchkeeping, and deck operations, ensuring that all tasks are performed efficiently and safely. The First Lieutenant acts as a direct liaison between the commanding officer and the crew, facilitating communication and helping to maintain order within the division.

In addition to this leadership function, the First Lieutenant is responsible for ensuring that all deck personnel are adequately trained in their roles and are adhering to safety protocols. This position plays a vital role in maintaining the ship's readiness and operational effectiveness, as the deck department is essential for various ship functions, including mooring, anchoring, and general seamanship duties.

The other roles mentioned, such as leading the engineering crew, managing supply chain logistics, and training new recruits, are significant responsibilities but are typically not primary functions of the First Lieutenant aboard a ship. Each of those responsibilities falls under different officers or departments within the ship’s organizational structure.