Draft Survey Calculator

Complete draft survey calculator supporting initial, intermediate, and final surveys with trim, LCF, and density corrections for accurate cargo quantity determination.

Draft Survey Calculator

Enter mean of port and starboard readings for each draft. This tool performs the trim, LCF and density corrections. Displacement at the corrected mean draft must be read from your vessels own hydrostatic tables and entered below, since hydrostatic curves are unique to every ship.

Survey Type

Survey

Observed Drafts (m)

Forward Draft

Aft Draft

Midship Draft

Ship Particulars

LBP (m)

LCF from Midships (m, + fwd)

Displacement and Density

Displacement at Corrected Draft, Table (t)

Dock Water Density (t per cu m)

Lightship Displacement (t)

Constant (t)

Previous Survey Deadweight, t (leave blank for Initial survey)

draft survey calculator cargo quantity hydrostatic corrections ship draft deadweight marine surveyor tool

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