The DEEP DRILLER is loaded as shown in the Sample Load Form #2 (Ballasting to Survival). What is the new draft if all the bulk materials are discharged?
• Displacement and draft change – how removing weight affects how deep the vessel sits in the water • Using the hydrostatic constant (TPI/TPC – Tons Per Inch/Centimeter Immersion) from the Sample Load Form • Total weight of all bulk materials shown on Sample Load Form #2
• From the Sample Load Form, how much total weight (in tons) is removed when ALL bulk materials are discharged? • Given that weight is being removed, should the new draft be deeper or shallower than the original draft on the form? • How do you convert the calculated draft change (usually in inches or centimeters) into feet to compare with the answer choices?
• Add up all bulk material weights from the form carefully; do not leave out any tank or silo listed as bulk. • Use the correct TPI/TPC value at the original draft from the hydrostatic data on the form – not a random or average value. • After finding the draft change, make sure you apply the sign correctly (removing weight makes the vessel rise) and convert properly to feet before picking the closest choice.
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