How much non-liquid deck load can the DEEP DRILLER, loaded as shown in the sample Load Form #4 (Drilling), accept if the weight is placed at a VCG of 130 feet? Ballast added or discharged to maintain draft at 60 feet is done so at 10 feet.
β’ Deck load and VCG (Vertical Center of Gravity) effects on overall KG β’ Using the sample Load Form #4 (Drilling) to find present displacement and KG β’ How added weight at a known VCG changes the combined KG and must satisfy the 60-foot draft condition
β’ From Load Form #4, what are the current displacement and KG of DEEP DRILLER before adding any deck load? β’ How do you set up the moment balance equation when you add an unknown deck load at 130 ft and ballast at 10 ft, while keeping the final draft (displacement) at 60 ft condition? β’ Which choice, when used as the unknown deck load in your equation, keeps the final KG within allowable limits shown or implied on the load form?
β’ Be sure you are using long tons consistently and not mixing units. β’ Confirm the VCG values: deck load at 130 ft and ballast at 10 ft, and use these correctly in your moment calculations. β’ Verify your final combined KG against the allowable KG or stability limit indicated on the load form for a 60-foot draft.
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