The document outlines the duties and responsibilities of the Officer of the Watch (OOW) according to STCW regulations. The OOW is primarily responsible for the safe navigation of the ship and compliance with collision regulations. Key duties include maintaining a proper lookout, navigating the ship according to the passage plan, using all navigational equipment, communicating via radio, and notifying the master immediately of any issues or hazards. The OOW must execute their duties safely and in accordance with international regulations.