Which of the following is a safety measure when discharging cargo at sea?

Monitoring inert gas pressure is crucial during the cargo discharge process in tankers, particularly when dealing with flammable or hazardous materials. Inert gas systems are designed to prevent the buildup of explosive vapors in cargo tanks by filling the space above the liquid with an inert gas, typically nitrogen, which reduces the risk of combustion. Regularly checking the inert gas pressure ensures that the system is functioning correctly, thereby maintaining a safe environment for both the crew and the vessel.

In comparison, while tank venting to the atmosphere might seem necessary for preventing overpressure, it can lead to the release of harmful vapors and poses a significant safety risk. Reducing crew members onboard does not inherently add to safety; in fact, it may reduce the availability of personnel needed for effective emergency response or cargo handling. Discharging during high tide could change the conditions and risks involved, such as ensuring stability and maneuverability of the vessel, but it is not a prescribed safety measure in relation to the gas management or inherent safety protocols during cargo operations.