You have 600 tons of below deck tonnage. There is no liquid mud aboard. If you have 150 tons of cargo above deck with a VCG above the deck of 2.8 feet, what is the maximum allowed VCG of the remainder of the deck cargo that is permitted? See illustration D036DG below.
• Deck cargo stability letter D036DG – how to use the curve of ABOVE DECK CARGO vs. BELOW DECK TONNAGE • Combined VCG (vertical center of gravity) of all deck cargo must not exceed the maximum allowed (3.0 ft above deck per the note on D036DG) • Use of moments = weight × VCG to find the combined VCG of two groups of deck cargo (known group and unknown group)
• From 600 tons below deck, what total ABOVE DECK CARGO does the D036DG curve allow? How much additional deck cargo (in tons) can you still carry beyond the 150 tons already on deck? • If the combined deck cargo VCG cannot be more than 3.0 ft above deck, how can you write a moments equation using: (1) 150 tons at 2.8 ft and (2) the remaining deck cargo at an unknown VCG? • Once you know the maximum combined VCG (3.0 ft) and the weights of the two deck‑cargo groups, how do you solve the equation for the unknown VCG of the remainder cargo?
• Be sure you read the total allowable deck cargo weight at 600 tons below deck correctly from the D036DG curve before doing any math. • Confirm you are using long tons consistently for all weights, and feet above deck for all VCG values. • After solving for the unknown VCG, check that the weighted‑average VCG of all deck cargo does not exceed 3.0 ft and that your result matches one of the choices.
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