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- Q158 - Navigation and Deck General/Safety
9. In an inert gas system, high pressure alarms are set in the main vapor collection line to cause an audible and visual alarm if the pressure reaches a certain level. What is the percentage of the lowest relief valve setting at which the alarm must sound?
The high-pressure alarm in an inert gas system must activate at 90% of the lowest relief valve setting to provide a safety margin and allow for crew response before any relief valve opens, adhering to industry standards and SOLAS/IMO guidelines.
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