🔍 Key Concepts

• VCG (Vertical Center of Gravity) definition and how it is found from stability data or tank tables • How tank sounding/ullage tables or capacity tables relate weight in the tank to a specific VCG value • The relationship between actual weight in the tank and the tabulated values for that particular tank on the COASTAL DRILLER

💭 Think About

• On a typical USCG exam stability problem using a named vessel (like COASTAL DRILLER), where do you usually find the VCG for a given weight of liquid in a specific tank? • Does the exam usually require you to calculate VCG from first principles, or to read it directly/interpolate it from provided stability/tank data for that vessel? • If the exact weight does not appear in the table, what method do you use between two tabulated values to obtain a more accurate VCG?

✅ Before You Answer

• Make sure you are looking at the correct tank table for #1 Drill Water Tank on the COASTAL DRILLER • Verify that you use the weight in kips, not volume, when matching or interpolating in the table • If interpolation is needed, check that your final VCG is between the VCG values corresponding to the bounding weights in the table