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Gross Tonnage Formula:
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The Gross Tonnage (GT) is a dimensionless value calculated from the total volume of a ship. It represents the overall internal volume of a vessel and is used for regulatory purposes, port dues, and safety rules in the maritime industry.
The calculator uses the Gross Tonnage formula:
Where:
Explanation: The K coefficient increases logarithmically with volume, reflecting that larger ships have relatively less non-revenue generating space.
Details: Gross Tonnage is a crucial measurement in maritime regulations that determines manning requirements, safety standards, port fees, and vessel classification. It provides a standardized way to compare vessel sizes across different types and designs.
Tips: Enter the total internal volume of the vessel in cubic meters. The volume must be greater than zero. The calculator will automatically compute the K coefficient and the resulting Gross Tonnage value.
Q1: What's the difference between gross tonnage and net tonnage?
A: Gross tonnage represents the total internal volume, while net tonnage subtracts non-revenue spaces like engine rooms and crew quarters.
Q2: Why is gross tonnage unitless?
A: Although based on volume measurements, gross tonnage is a dimensionless number used for comparative and regulatory purposes rather than representing actual mass or volume.
Q3: How accurate is this calculation?
A: This follows the International Maritime Organization's standardized formula, making it universally accepted for regulatory purposes.
Q4: What volume measurements are included?
A: All enclosed spaces of the vessel are included in the volume calculation, from the keel to the funnel.
Q5: Are there different formulas for different vessel types?
A: The basic formula is standardized, but specific vessel types may have additional measurement rules for specialized spaces.