Question 2288 Deck Safety
70% to passYour drafts are: FWD 5'-08", AFT 6'-02". From past experience, you know that the vessel will increase her draft 1 inch for every 8 tons loaded. There is rig water on board and 11 tons of deck cargo. How many more tons of cargo can be loaded and still maintain the same trim? See illustration D037DG below.
The correct answer is D) 24 tons. The explanation is as follows: 1. The vessel's draft is FWD 5'-08" and AFT 6'-02", which indicates the vessel is already trimmed by the stern. With 11 tons of deck cargo on board, the vessel will increase its draft by 1 inch for every 8 tons loaded. To maintain the same trim, the vessel can load an additional 24 tons of cargo before the draft changes. 2. This is based on the principle that to maintain the same trim, the change in draft forward and aft must be proportional. By loading an additional 24 tons, the vessel will increase its draft by 3 inches (24 tons / 8 tons per inch), which will keep the same trim. 3. The other options are incorrect because Option A) None would not allow any additional cargo to be loaded, Option B) 10 tons would not maintain the same trim, and Option C) 18 tons would not be sufficient to maintain the same trim.
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