According to the International Grain Code, what is the minimum allowable GM for a vessel carrying grain in bulk?

• A. 0.20m
• B. 0.25m
• C. 0.30m
• D. 0.35m

Answer: (C)

The minimum allowable metacentric height (GM) for a vessel carrying grain in bulk, as specified by the International Grain Code, is 0.30 meters. This requirement is in place to ensure adequate stability during operations, recognizing that grain cargo can shift, which can impact the vessel's center of gravity and overall stability. A GM of at least 0.30 meters helps to maintain a safe margin against excessive heel and ensures that the ship can return to an upright position after being tilted by external forces, such as wind or waves. This is particularly important in preventing capsizing, especially in conditions where the cargo can settle and change the vessel's center of gravity.