The Largest Yachts in the world, and how do we know??? (Gross Tonnage explained)

Wed, 15 Apr 2026 10:00:55 +0000

To get a quote for your vessel from Keane Specialty Insurance:
https://keanespecialty.com/get-a-quote?pid=DSY

Gross tonnage is one of the most important terms in yachting, and also one of the most misunderstood.

In this video, I explain what gross tonnage actually means, why it has nothing to do with weight, and why it matters so much when it comes to the size, value and complexity of a yacht. Because in reality, two yachts can be very similar in length and yet offer completely different amounts of internal volume.

That matters for buyers, owners, brokers and anyone trying to understand what a yacht really is beyond the headline figure of 50m, 60m or 100m.

I also look at why so many yachts are designed to stay below 500GT, how gross tonnage affects regulations and ownership, and why length alone can be a very misleading way to judge the true scale of a yacht.

Along the way, I compare yachts of similar length with dramatically different GT figures, and count down the yachts that take internal volume to the extreme.

In this video:
• What gross tonnage actually means
• Why GT matters more than length in many cases
• Why 500GT is such an important threshold
• How yacht designers work around GT limits
• The highest-volume yachts in the world

This video is sponsored by Keane Specialty Insurance.
If it floats, they will quote it.
For a tailored quote for your yacht or boat, use the link in the description above.

And next Saturday, we’ll be showing you a remarkable 43m sports yacht called Genesis, presented by Katia.

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