What is the primary duty of the Helmsman Control Officer (HCO)?

The primary duty of the Helmsman Control Officer (HCO) is indeed to assist the Officer of the Deck, not oversee flight deck operations. The HCO plays a crucial role in the ship's navigational safety by operating the ship's steering and ensuring that it adheres to the determined course. This position is essential for maintaining the vessel's intended path, especially in complex navigational situations.

In conjunction with the HCO's responsibilities, having clear communication with the Officer of the Deck helps in executing navigational orders accurately and effectively. The collaboration between these positions is vital for the safe operation of the vessel, particularly when maneuvering in busy or hazardous waters.

Overseeing flight deck operations and managing communication systems, as well as maintaining navigational charts, are important functions but are not the primary focus of the Helmsman Control Officer's role. These duties are typically assigned to other personnel within the ship's command structure and operational teams.