Superyacht Eco Association
SEA Index®

The Superyacht Eco Association (SEA) Index is a non-profit initiative historically founded by the Yacht Club de Monaco and Credit Suisse.

The SEA Index tools have helped an increasing number of superyacht owners to impartially assess the environmental impact of their yachts. The tool was developed in response to strong demand from forward-thinking superyacht owners, as well as with key industry players such as captains, shipyards, operators and an independent certification company. Through increased transparency, we aim to empower yacht owners with proactive measures to make informed decisions when buying, selling or chartering a vessel.

The SEA Index® CO2 certification application process is available to any yacht owner of vessels over 24m. Join us in a new era of responsible yachting.

Prince Albert II

“The next decade will be a decisive one for the future of our planet. Climate change is one of our biggest challenges.”

HSH Prince Albert II of Monaco, YCM President

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Motor yachts (24m+)
in the world

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Sailing yachts (24m+)
in the world

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New motor yachts (24m+)
delivered in 2024

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New sailing yachts (24m+)
delivered in 2024

Photo ©Guillaume Plisson

Our Vision

Our vision is that SEA Index becomes the go-to superyacht environmental impact rating system. Through a range of transparent, unbiased tools, SEA Index empowers stakeholders to easily assess and compare a yacht’s environmental impact.

By mobilising the sector to design and create new, more environmentally friendly yachts with lower fuel consumption, we can preserve the oceans for future generations. We envision a future where the majority of superyachts have a SEA Index rating of 3* or higher.

Our Mission

Our mission is to support and guide superyacht owners towards less energy-intensive yachting by empowering them as they make informed decisions, and incentivising them to engage with more eco-responsible yachting.

Alongside this, we bring together shipyards, innovators and destinations to drive the collective shift towards more sustainable yachting.

Through the SEA Index network, we aim to create a true ecosystem of stakeholders, providing impartial information and helping to implement new solutions.

SEA Index now certifies yachts with methanol & hydrogen fuel-cell technology! Contact us for more information on this new development.