In order for draft surveys to be carried out, the ship must be in a floating position.

In short, draft survey, which is a method of determining the weight of the cargo with the help of some static calculations based on the principle of buoyancy of the water, is a weighing method accepted by the customs of many countries during the loading or unloading of cargo carried by sea vehicles. In this method called draft survey hydrometer method, the apparent density of sea water or fresh water in the air is calculated. The difference is equal to the weight of the loads loaded or unloaded.ĮCE / Energy / 19 method is used in draft survey studies by surveillance and survey organizations. In a very simple way, the amount of water overflowed by the sea vehicle before loading or unloading is found and compared with the amount of water it overflows after loading or unloading operations are completed. Accordingly, in order to determine the weight of loads loaded or unloaded on a vessel, it is sufficient to calculate the amount of water carried by this vessel. On the basis of the draft survey method, Archimedes found the buoyancy law. Draft survey calculations are a method that provides accurate results and can be applied quickly and easily. Today, the draft survey results are taken as basis in the preparation of the bill of lading and in the calculation of some fees and port fees. This method has been used in the maritime industry for centuries. One of the methods used to determine the weight of dry cargoes is the draft survey method.

Draft survey calculation excel sheet