Load Line - Seasonal Marks Check

Load-line seasonal mark (S, W, T, F, TF, WNA) applicable for the ship's voyage - a function of Load Line Zone and date.

Load lineSeasonalZones

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Mark} = f(\text{zone}, \text{date})

Symbol	Meaning	Unit
$Zone$	Load line zone

Source: Load Line Convention 1966

Load-line seasonal mark (S, W, T, F, TF, WNA) applicable for the ship's voyage - a function of Load Line Zone and date.