Independent draft surveys for accurate bulk cargo weight determination at all Singapore ports. IMO displacement method, ±0.5% accuracy, accepted by customs, trade finance banks, and all major commodity buyers and sellers.
A draft survey determines the weight of cargo loaded or discharged from a vessel by calculating changes in the vessel's displacement. It is the IMO-recommended method for bulk cargo weight verification and is universally accepted by charterers, buyers, sellers, banks, and customs authorities worldwide.
SGMA's certified draft surveyors conduct before and after draft readings at all six draft marks, measure all ballast and fresh water tanks, and apply temperature and density corrections to arrive at a certified cargo weight figure accurate to within ±0.5%.
Draft surveys are the only practical method for weighing bulk cargoes on board a vessel. Discrepancies between bill of lading quantities and draft survey quantities can have significant financial and legal implications for both buyers and sellers.
A systematic IMO-approved methodology ensuring the highest possible accuracy in cargo weight determination.
Six-point draft readings (forward, midship, aft — both sides) before cargo operations commence.
Complete measurement of all ballast, fresh water, fuel oil, and other liquid tanks aboard the vessel.
Sea water density measured at vessel's waterline location for accurate displacement correction.
Supervision or monitoring of cargo loading or discharge operations throughout the port call.
Repeat of all draft readings and tank soundings after cargo operations are completed.
Weight calculated using IMO displacement method. Certified report issued within 48 hours.
A draft survey determines the weight of cargo loaded or discharged from a vessel by measuring changes in vessel displacement. It is the IMO-approved industry standard for bulk cargo weight verification.
A properly conducted draft survey achieves accuracy within ±0.5% of the actual cargo weight. SGMA surveyors use the IMO-recommended procedure and modern calculation software for maximum precision.
Draft surveys are required for bulk cargo operations where cargo cannot be weighed by other means. Common for coal, grain, iron ore, fertilisers, and other bulk commodities loaded or discharged in Singapore.
Yes. Draft survey results are accepted by MPA Singapore, customs authorities, trade finance banks, and international commodity trading organisations as certified proof of cargo quantity.
Accurate bulk cargo weight verification by certified surveyors. Book online for instant confirmation.