Draught and displacement surveys:
One of the ways to ascertain the total loaded or discharged weight of (bulk) cargoes.
These surveys are implemented by our sworn surveyors in a two-way manner; i.e. before loading/discharge and after loading/discharge, upon which -on basis of the vessel’s draught mark readings- the vessel’s displacements are determined.
Corrections for vessel’s trim, location of draught marks and density of outboard basin water will be applied.
The difference between both corrected displacements is the loaded/discharged cargo weight; taking into consideration the ballast/potable water and fuel oil manipulations during loading/discharge.
A well conducted draught survey should achieve an accuracy within 0.5%.
Lately there is an increasing demand for draught surveys, notably from the side of P&I Clubs.