Which of the following duties does the GPOW regularly oversee?

The primary responsibility of the Gangway Petty Officer of the Watch (GPOW) is to ensure the security and safety of the gangway, which includes overseeing the personnel and activities associated with this entry point of the ship. This involves coordinating the access of personnel and visitors to the ship, verifying proper identification, and ensuring that security protocols are followed for the safety of all onboard. Monitoring the gangway not only includes the physical security aspect but also assessing any threats and managing the flow of people to maintain order, thus making it essential for the GPOW to actively coordinate gangway security on a regular basis.

While training new crew members, monitoring the ship's navigation, and maintaining the ship's cargo inventory are important tasks within the larger ship operations, they align more closely with the responsibilities of various other personnel on board, such as training officers or navigators. Therefore, these duties are not part of the GPOW's primary role.