When is the best time to test the overfill alarm on a tankship?

The best time to test the overfill alarm on a tankship is before loading operations. This is crucial because testing the alarm prior to starting the loading process allows crew members to ensure that the safety systems are functioning correctly, providing the necessary assurances that they will activate properly if levels approach unsafe limits during loading.

Conducting this test at this time helps to prevent potential overfills and the associated risks of spills or environmental hazards, which are critical in the context of tank operations. By performing the test beforehand, the crew can proactively identify and address any issues with the alarm system, ensuring compliance with safety protocols and avoiding operational disruptions later.

Testing during other scenarios, such as while discharging oil or during high seas, may not provide an accurate assessment of the alarm's functionality and could place the vessel and crew at heightened risk due to the nature of operations taking place at those times. Similarly, testing before reaching port might not offer the necessary time to rectify any issues that could lead to overfills during the loading process.