It was the first successful attempt to introduce a universal tonnage measurement system.

This gave some advantages in strength and allowed them to pay lower canal tolls under the tonnage measurement rules then in effect.

The guide also contains information about surveys of radio equipment and load lines, along with revised survey instructions for tonnage measurement of ships.

As a yacht, the ship's tonnage was calculated at 300 tons, using a special yacht tonnage measurement.

Early attempts at creating rating rules were based on the British "old tonnage measurement" system to calculate the volume of the hold of large commercial ships.

'International Convention on Tonnage Measurement of Ships, 1969', International Maritime Organisation.

Gross register tonnage was replaced by gross tonnage in 1994 under the Tonnage Measurement convention of 1969, and is no longer a widely used term in the industry.

The gross tonnage calculation is defined in Regulation 3 of Annex 1 of The International Convention on Tonnage Measurement of Ships, 1969.

Additional tasks include establishing a vessels' ability to navigate, tonnage measurement of ships, handing out of documents necessary for navigation, establishing the level of proficiency in case of professionals employed in the maritime transport etc.

It outlines the requirements for tonnage measurement, the weighing of cargo, the safe loading and unloading of cargo at terminals, the securing and safe carriage of cargo, and passenger and personnel safety during these operations.

Gross tonnage, along with net tonnage, was defined by The International Convention on Tonnage Measurement of Ships, 1969, adopted by the International Maritime Organization in 1969, and came into force on July 18, 1982.

After the German reunification of 1990, the DHI was merged with Bundesamt für Schiffsvermessung (BAS) [Federal Agency for Tonnage Measurement] to form the Federal Maritime and Hydrographic Agency.

Tonnage measurements are now governed by an IMO Convention (International Convention on Tonnage Measurement of Ships, 1969 (London-Rules)), which applies to all ships built after July 1982.

As each ship was measured on the same basis it did not matter that the tonnage measurement was not a 100% accurate measure of volume as all vessels were measured on the same basis which led to an equitable basis of allocating tax.

Gross and net register tonnages were replaced by gross tonnage and net tonnage, respectively, when the International Maritime Organization (IMO) adopted The International Convention on Tonnage Measurement of Ships on 23 June 1969.

While the rules for measuring ships changed over the years, the standard of 100 ft3 per ton remained in effect until a new system was established by The International Convention on the Tonnage Measurement of Ships, effective for new ships in July 1982.