A tanker loads at a terminal within the tropical zone. She will enter the summer zone six days after departing the loading port. She will burn off 45 tons/day and daily water consumption is 8 tons. How many tons may she load over that allowed by her summer load line?
• Load line zones and how they affect the maximum permitted draft/dispacement • Relationship between extra cargo allowed in a lighter zone and the consumption of fuel and water before entering a more restrictive zone • How many days the vessel will be in the tropical zone before crossing into the summer zone
• How long is the vessel allowed to take advantage of the greater tropical load line before she must comply with the summer load line? • What weights (fuel and water) will be used up before reaching the summer zone, and how does that create room for extra cargo? • When you multiply daily consumption by days, what total weight do you get, and how does that compare with the answer choices?
• Confirm the ship is in the tropical zone for 6 days before entering the summer zone • Calculate total fuel consumption over the 6 days and total water consumption over the same period • Add the two consumptions together to find the maximum extra cargo that can be loaded above the summer load line, assuming she just meets the summer line upon entry to that zone
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