A vessel is limited to a maximum draft of...

Question 1 / 2066636eec28f7522a1c51d199

Question 1 of 2066636eec28f7522a1c51d199

A vessel is limited to a maximum draft of 25'-11". The present drafts are: FWD 24'-10", AFT 23'-02". How much more cargo can be loaded and where should it be located if a drag of 18 inches is desired? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

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66636eec28f7522a1c51d199

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🔍 Key Concepts

• Maximum allowable draft versus current drafts and desired drag • Using the vessel’s tipping center/LCF (Longitudinal Center of Flotation) and moment-to-change-trim tables in the Stability Data Reference Book • Relationship between trim change, added weight, and its distance from the tipping center

💭 Think About

• First, determine what the new forward and aft drafts must be if the vessel has the desired 18" drag while not exceeding the maximum draft limit anywhere. What are the target FWD and AFT drafts? • Next, calculate how much the trim (difference between drafts FWD and AFT) must change from the present condition to reach the desired drag. How many inches (or feet) of trim change is needed? • Then, use the appropriate table in the Stability Data Reference Book (blue pages) to relate required change of trim to a trimming moment (tons-feet). Once you know the trimming moment, how do you find the combination of cargo weight and its distance from the tipping center that would produce that moment?

✅ Before You Answer

• Be sure the final aft draft does not exceed 25'-11" and that the final forward draft is consistent with the desired drag. • Confirm that you are using the correct Moment to Change Trim 1 inch (MT1) or equivalent value for this ship from the blue pages. • After finding the required trimming moment, verify each option’s weight × distance (tons-feet) and see which one closely matches the required moment and gives the correct final drafts.

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Question 1 of 20

640 tons 74 feet aft of the tipping center

525 tons 18 feet forward of the tipping center

690 tons 62 feet aft of the tipping center

345 tons 124 feet aft of the tipping center

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Question 1 / 2066636eec28f7522a1c51d199

Question 1 of 2066636eec28f7522a1c51d199

Back

Question 1 of 20

66636eec28f7522a1c51d199

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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