What is the position of the second mate on a ship?

The second mate, under the leadership of the captain and the first mate, performs the duties of the watch prescribed for navigation and berthing, and is in charge of the steering equipment. The planning and implementation of routes and the correction of charts are usually done by the second mate. Some foreign ships, the second mate also commissioned by the captain of the ship's security officer, as well as responsible for the management of the ship's medical equipment, as the ship's doctor's duties.