1. What is Gross Tonnage?

Gross Tonnage (GT) is a measure of a ship's overall internal volume. It's calculated from the total enclosed volume of the vessel and is used to determine things like manning regulations, safety rules, and registration fees.

2. How Does the Calculator Work?

The calculator uses the standard formula for power boats:

Where:

• \( L_{ft} \) — Length of the vessel in feet
• \( B_{ft} \) — Breadth (beam) of the vessel in feet
• \( D_{ft} \) — Depth of the vessel in feet

Explanation: The formula calculates the total enclosed volume of the vessel and converts it to gross tonnage units.

3. Importance of Gross Tonnage

Details: Gross Tonnage is crucial for vessel classification, determining regulatory requirements, calculating port fees, and establishing safety standards.

4. Using the Calculator

Tips: Enter the vessel's length, breadth, and depth in feet. All values must be positive numbers. The calculator will compute the gross tonnage.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between gross tonnage and net tonnage?
A: Gross tonnage includes all enclosed spaces of the ship, while net tonnage subtracts spaces not used for cargo (like engine rooms).

Q2: Is this formula applicable to all vessel types?
A: This simplified formula is primarily for power boats. Different formulas may apply for sailing vessels or ships with complex structures.

Q3: How accurate is this calculation?
A: This provides a good estimate, but official tonnage measurements may require more precise calculations by certified surveyors.

Q4: Why is 0.67 used in the formula?
A: The 0.67 factor accounts for the shape of the vessel and the fact that not all internal volume is usable space.

Q5: Does gross tonnage relate to weight?
A: Despite the name, gross tonnage measures volume, not weight. 1 gross ton = 100 cubic feet of enclosed space.