Gross Register Tonnage

The gross register tonnage (GRT) is a unit of measurement for the size of a ship and is often used for the registration and classification of ships. The GRT of a ship refers to its volume, which is defined by the dimensions of its structure. This includes the interior space of the ship, including cargo holds, recreation rooms, engine rooms and other enclosed areas, but excluding the space below deck needed for the buoyancy of the ship. The GRT is calculated in accordance with international standards laid down in the International Convention on Tonnage Measurement of Ships of 1969. These standards define the methods for calculating GRT and the consideration of various factors such as length, breadth, draught and structure. The GRT is often used to determine the registration category of ships and serves as the basis for charging fees, insurance premiums and other legal and economic aspects related to ship operations. Overall, gross registered tonnage is an important metric for the shipping industry, allowing the size and capacity of ships to be quantified and compared. It is used by shipping authorities, shipping companies, insurance companies and other players in the shipping industry to regulate and evaluate various aspects of ship operations.