You have 360 tons of below deck tonnage and 145 tons of above deck cargo on board. You must load 220 tons of liquid mud below deck. How much more deck cargo can you load? See illustration D036DG below.
• Use the loading diagram D036DG: vertical axis is ABOVE DECK CARGO (long tons), horizontal axis is BELOW DECK TONNAGE (long tons). • Follow the printed USCG stability loading instructions on the diagram to find the safe loading limit for a given below‑deck tonnage. • Remember to add the new liquid mud to the existing below‑deck tonnage before going to the diagram.
• After adding 220 tons of liquid mud, what is the new total below deck tonnage you must use on the horizontal axis? • At that new below‑deck value, what is the maximum safe above‑deck cargo where the vertical line meets the boundary curve between SAFE and UNSAFE loading? • Once you know the maximum allowable above‑deck cargo from the curve, how do you use the currently loaded 145 tons to find how much additional deck cargo can be carried?
• Be sure you are reading long tons (not short tons) on both axes. • Confirm that your intersection point with the curve is on the safe side (at or below the curve). • Double‑check that you subtract the already-loaded 145 tons of deck cargo from the maximum allowable deck cargo at the new below‑deck tonnage.
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