🔍 Key Concepts

• Vertical moment = weight × vertical center of gravity (VCG) above the reference (baseline or keel) • Using the tank capacity/sounding tables for a specific vessel (COASTAL DRILLER) to get volume and moment data at a given sounding • Unit checks: kips (1 kip = 1,000 lb) and how moments are often tabulated directly in ft‑kips in stability books

💭 Think About

• From the COASTAL DRILLER’s #1 drill water tank table, what information is given directly at 14.0 ft: volume, weight, and/or vertical moments? • If the table does NOT give vertical moments directly at 14.0 ft, how would you interpolate between two soundings to find the correct value? • How do you confirm you’re using the correct reference (baseline/keel) for the vertical distance used in the moment calculation?

✅ Before You Answer

• Confirm you are reading from the correct tank (#1 drill water tank) and the correct sounding height (14.0 ft) in the stability booklet or exam data sheet • Verify whether the table already lists vertical moments in ft‑kips so you may not need to calculate weight × VCG yourself • Double‑check units: volume to weight using correct density, then multiply by vertical distance in feet to get ft‑kips before comparing to the choices