Using sheet 25 in the Guidance Manual for...

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Question 1 of 2066636ee728f7522a1c518e6c

Using sheet 25 in the Guidance Manual for Loading M.V. Grand Haven, determine the amount of ballast required in tank No. 5 (P & S) to maintain drafts of 17'-00" forward and 22'-06" aft for a vessel loaded with grain which has a test weight of 33 lbs.

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Question 1 of 20

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🔍 Key Concepts

• Trim and draft calculations using loading manuals and hydrostatic data • Effect of grain test weight (33 lbs) on cargo weight and resulting drafts/trim • How ballast distribution in symmetrical tanks (No. 5 Port & Starboard) affects trim and mean draft

💭 Think About

• Start from the loading condition on sheet 25 for M.V. Grand Haven: What are the initial drafts before adding ballast when loaded with 33 lb grain? • How does adding equal amounts of ballast to both No. 5 P & S tanks change the forward and aft drafts—does it mostly change trim, mean draft, or both? • Which listed ballast amounts bring the calculated drafts closest to 17'-00" forward and 22'-06" aft when you follow the step-by-step table on sheet 25?

✅ Before You Answer

• Be sure you are using the correct column for 33 lb grain in the Guidance Manual (not 60 lb or another test weight). • Confirm you are reading the No. 5 P & S tank capacities/effects per ton correctly from sheet 25 (change in trim/draft per ton or per 10 tons, depending on table format). • After picking a trial ballast amount from the choices, recompute both forward and aft drafts and verify that they match 17'-00" and 22'-06" within the manual’s rounding or interpolation rules.

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