🔍 Key Concepts

• LCG (Longitudinal Center of Gravity) definition and how it is measured on a vessel or drilling unit • Relationship between trim, LCG, and LCF (Longitudinal Center of Flotation) when the unit is level (no trim) • Using hydrostatic/stability data or curves for the COASTAL DRILLER at a given draft to find the correct LCG value

💭 Think About

• If the unit is level (no trim), what does that tell you about the relative positions of LCG and LCB (Longitudinal Center of Buoyancy)? • Where is the longitudinal reference point (zero station) on the COASTAL DRILLER, and how are positive distances measured from it? • Looking at the stability booklet or exam diagram for COASTAL DRILLER at 10.5 ft draft, which table or curve would you use to read off the LCG value?

✅ Before You Answer

• Confirm that LCG is measured along the length of the unit from a defined reference (often AP, FP, or midships) in feet • Verify that you are using the row/entry for exactly 10.5 ft draft in the provided hydrostatic or loading data for COASTAL DRILLER • Check that the selected value’s units are feet forward or aft of the reference point, and that you interpret the sign/direction correctly before comparing with the answer choices