What is Draft Survey?

Draft Survey is an essential method used for calculating the cargo quantity on bulk carrier ships. Water pushes and holds objects that are less dense than itself toward the surface. Based on Archimedes’ principle, the ship’s draft (the depth to which it is submerged in water) is measured to ensure its stability and safety. By using the ship’s stability books, the weight loaded onto or discharged from the vessel is calculated accordingly. The waterline depths at the bow, stern, and midship sections of the vessel are measured, and these measurements are used to determine the quantity of cargo on board. CIS Karkont provides accredited quantity determination services by Draft Survey at all ports in Turkey.

Why Draft Survey?

Draft Survey is the most practical method for determining the quantity of cargo loaded onto or discharged from a vessel. Unlike weighbridge-based quantity determination, where each vehicle (hundreds or even thousands of trucks, depending on the ship’s size) is weighed empty and full, Draft Survey calculations are only performed at the beginning and end of the loading/unloading process. In some cases, Draft Survey is used as an additional verification method alongside weighbridge measurements, while in others, it serves as the sole method for quantity determination. CIS Karkont’s Draft Survey service is always available for accurately determining the quantity of bulk cargo.

CIS Karkont’s Draft Survey Service

As one of Turkey’s leading inspection companies, CIS Karkont Inspection Services specializes in marine surveys as well. The accredited Draft Survey service it provides offers crucial support to shipowners, exporters, importers, and all related parties by ensuring accurate cargo quantity calculations. With its experienced teams and internationally accredited Draft Survey service, CIS Karkont makes a reliable contribution to the accurate determination of cargo quantity in international trade.