🔍 Key Concepts

• Using the trim and stability booklet / capacity plan for DEEP DRILLER • How to read a soundings table to get volume and vertical center (VCG/LCG/TCG) for a tank • Calculating vertical moment = weight × vertical distance (or using tabulated moments directly)

💭 Think About

• First, where in the DEEP DRILLER data book would you find information for tank C3P, and what two numbers do you actually need from that table to get a vertical moment? • Think about whether the vertical moments in the booklet are already tabulated per inch/foot of sounding, or if you must multiply a weight by a VCG yourself. • Compare the approximate size and location of tank C3P to other similar tanks: should its vertical moment be relatively small, moderate, or very large?

✅ Before You Answer

• Confirm you are using the correct tank (C3P) and the correct soundings column (10 feet, not ullage). • Verify whether the table gives vertical moments directly, or if it gives weight and VCG and expects you to calculate the moment. • Check that your final vertical moment is in foot-tons and is of the same order of magnitude as other tanks of similar capacity.