🔍 Key Concepts

• Use the capacity/sounding table for tank 1P on the DEEP DRILLER to find the quantity of ballast (in long tons) that corresponds to a sounding of 7.58 feet • Find the KG or vertical center of gravity (VCG) above the baseline for the liquid in tank 1P at that sounding • Compute vertical moments as: quantity of ballast (LT) × VCG (ft)

💭 Think About

• From the trim and stability booklet, what is the quantity of ballast (in long tons) at exactly 7.58 ft, or how can you interpolate between two soundings if 7.58 ft is not listed? • Once you know the quantity, how do you use the listed VCG or KG for that sounding to obtain a vertical moment value? • Compare the order of magnitude: does your computed vertical moment make sense compared with the ship’s overall displacement and typical tank contributions?

✅ Before You Answer

• Verify you are using the correct table and correct tank (1P) for the DEEP DRILLER, not a similar tank • Be certain the units match: sounding in feet, quantity in long tons, and VCG in feet above baseline before multiplying • Recheck any interpolation steps in the table so your final vertical moment is consistent with nearby tabulated values