Mineral category

Mineral water gauge weighing refers to the method of calculating the weight of goods by measuring the draft difference of a ship before and after loading or unloading mineral products (such as coal, iron ore, copper concentrate, etc.), combined with ship information and water density data. Suitable for the transfer of mineral products in bulk carrier transportation.

operating steps

1. Measure the six draft marks on the bow (F), midship (M), and stern (A) of the ship. Read data using a draft mark or an electronic draft gauge (such as Echo Sounder).

2. Calculate the average draft correction for longitudinal and transverse tilt effects.

3. Query the displacement based on the average draft, refer to the Hydrostatic Table of the vessel, and obtain the current displacement.

4. Correct the water density measurement of the port water density (Density).

5. Calculate the net weight of mineral products by deducting the fuel and fresh water consumption during loading/unloading from the weight of the goods.