1, the gross tonnage is the volume measured by a certain method in all closed spaces of the ship, which has nothing to do with the daily work of the crew. Remember, although the gross tonnage is called tons, it is volume.

2. The displacement is the volume of boiling water discharged by the ship, which is related to the water density in the water area and represents the weight of the whole ship. The unit is metric tons. European and American countries also use long tons.

3. The net deadweight is the total deadweight of the ship, which can be used to load goods after removing oil, water, meals and constants.

Needless to say, the cabin volume can be found in the cabin volume table. Cargo hold can be divided into bulk hold and packing hold, and bulk hold is larger than packing hold. This is the volume, expressed in cubic meters.

5. Generally, it is not necessary to calculate the cargo density on board. Usually, the shipper will provide corresponding data, such as stowage coefficient and density. If you want to do it yourself, you can calculate the volume and weight of the goods.