Subtracting the height of the center of gravity corrected for longitudinal free surface effects from the height of the longitudinal metacenter of a MODU yields __________.
• Meaning of K, G, M, and L in stability notation (e.g., KG, KM, GM, GML, KML)** • Definition of longitudinal metacentric height versus transverse metacentric height • Effect of free surface correction on the position of the center of gravity (G) and how that changes metacentric height
• Identify which letter combination represents a distance from the corrected center of gravity (G) to a metacenter (M) in the longitudinal sense • Ask yourself whether subtracting a corrected KG from KM or KML will give a value measured from K or from G • Think about which symbol(s) in the answer choices correspond to the metacentric height rather than an absolute height above the keel
• Be clear on what the subtraction is: (height of longitudinal metacenter) − (height of corrected center of gravity) • Verify which term in the options represents a metacentric height measured from G versus a height measured from K • Confirm that you are dealing with the longitudinal (fore‑and‑aft) metacenter, not the transverse one
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