You have 60 tons of below deck tonnage and 220 tons of above deck cargo on board. You must load 240 tons of liquid mud below deck. How much more deck cargo can you load? See illustration D036DG below.
• Use the loading diagram D036DG that relates below deck tonnage (horizontal axis) to above deck cargo (vertical axis). • Remember that you must add the new liquid mud to the existing below deck tonnage before going to the graph. • After finding the maximum permitted above‑deck cargo from the curve, subtract what you already have on deck to find how much more you can load.
• First, compute the new total below‑deck tonnage after adding the liquid mud. Where does this value fall on the horizontal axis of the diagram? • From that below‑deck value, trace straight up to the safe‑loading curve, then straight across to read the allowed above‑deck cargo. How does this compare with the 220 tons already on deck? • Is the point for your final loading condition on or below the curve (safe) or above it (unsafe)?
• Be sure you are reading long tons on both axes (the diagram uses long tons). • Confirm that you are using the total below‑deck tonnage (original + liquid mud), not just the mud alone. • Double‑check that you subtract the existing 220 tons from the maximum allowed above‑deck cargo to get the additional deck cargo you can load.
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