margin line

noun Nautical.

an imaginary line used in making calculations regarding the flooding of hulls, running fore-and-aft 3 inches (8 cm) below the upper surface of the bulkhead deck at the side.

the line along which the planking on a transom-sterned vessel terminates aft.

Words nearby margin line

margherita, margie, margin, margin account, margin call, margin line, margin of safety, margin plank, marginal, marginal cost, marginal costing

Origin of margin line

First recorded in 1840–50