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Encyclopedia of Marine and Energy Technology

Draught, draft


The vertical distance from the moulded base line amidships to the actual waterline.

Air draught  -The maximum distance from the water level to the highest point of the ship at the prevailing draught.

Design draught  -The draugth on which the fundamental design parameters of the ship are based.

Extreme draught  – The distance from the waterline to the underside of the keel.

Moulded draught  – The distance from the summer load line to the base line, measured at the midship section.

Scantling draught  – The maximum draught at which the strength requirements for the

scantlings of the ship are met.

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