🔍 Key Concepts

• Longitudinal moments in stability/trim calculations • The definition of LCG (Longitudinal Center of Gravity) • General formula: position of a center = total moment ÷ total weight

💭 Think About

• Ask yourself: when you add up all the individual weights times their distances forward/aft, what physical point along the ship are you actually locating? • Think about other centers (like center of gravity in the vertical direction) — what do you divide by total weight to find a center? • Which option is describing a location along the length of the vessel, rather than a type of force or moment?

✅ Before You Answer

• Verify which answer choice names a position (a center) along the ship’s length, not a type of moment or force. • Recall that a moment is weight × distance; dividing by total weight removes the weight unit and leaves you with a distance. • Eliminate any options that are clearly types of moments rather than a geometric location.