🔍 Key Concepts

• Trim is the difference between draft forward and draft aft; it depends on where the ship’s weight and buoyancy act along the length. • Longitudinal centers are key: LCG (Longitudinal Center of Gravity), LCB (Longitudinal Center of Buoyancy), and LCF (Longitudinal Center of Flotation). • Think about which two longitudinal points, when not in the same place, create a trimming moment that pitches the ship by the bow or stern.

💭 Think About

• Which two points represent where the ship’s total weight acts and where the total buoyant force acts, measured along the ship’s length? • If those two points are not aligned vertically, what kind of moment is created and around which area does the ship tend to rotate when trimming? • Look at each option and ask: are both of these centers longitudinal and are they the correct pair to describe weight versus buoyancy for trim?

✅ Before You Answer

• Verify the definitions of LCG, LCB, and LCF in the context of longitudinal stability and trim. • Check which of the listed points are primarily about weight location and which are about buoyancy location along the ship’s length. • Eliminate any option that includes a point that is mainly used for transverse stability (side-to-side) rather than longitudinal trim (bow-to-stern).