Legal

Legal notice

Publisher

Company: BIUTOPIC SAS
Legal form: Société par Actions Simplifiée (French simplified joint-stock company)
SIREN: 102 307 519
Registered office: Nantes, France
Email: hydronaute@biutopic.com
Website: hydronaute.net

Publication director

Hosting

Company: Vercel Inc.
Address: 440 N Barranca Ave #4133, Covina, CA 91723, United States
Website: vercel.com

Intellectual property

All content on this site — text, visuals, illustrations, logos, source code — is the exclusive property of BIUTOPIC SAS unless otherwise stated. Any reproduction, distribution or use, even partial, without prior written authorisation is prohibited.

Personal data

Data collected via the booking form (name, email, dates) is used solely to process your request and contact you. It is never sold or shared with third parties.

Under the GDPR and French data protection law, you have the right to access, correct and delete your data. To exercise these rights: hydronaute@biutopic.com.

Cookies

This site uses a single session cookie (voyage_persona) to remember your browsing profile. It contains no personally identifiable information and expires when you close your browser. No advertising cookies or third-party tracking tools are used.

External links

Links to third-party sites (Plastic Odyssey, institutional partners) are provided for information only. BIUTOPIC SAS is not responsible for the content of those sites.

Booking & refunds

A booking is made by paying a 10% deposit, which locks the chosen dates.

As long as the voyage has not been confirmed by BIUTOPIC SAS, this deposit is fully refundable on request at hydronaute@biutopic.com. Once the voyage is confirmed, the deposit is donated to Plastic Odyssey and is no longer refundable. Any balance is settled after confirmation.

If the voyage cannot take place due to BIUTOPIC SAS, the deposit is refunded in full.

Prize-draw rules

Organiser: BIUTOPIC SAS, SIREN 102 307 519, 14 bis rue de la Carterie, 44000 Nantes, France. Entry is free with no purchase necessary.

“Treasure Island” game — event of 1 June 2026. Open to anyone who took part in the game at that event. Three (3) winners are designated on 15 July 2026. Identical prize for each: a four (4) hour afternoon outing aboard L'Hydronaute, the three winners together. Each winner may bring one guest. The outing is skippered by the project founder. The outing date is communicated to the winners, subject to the boat's launch. Prize non-transferable, non-exchangeable and non-refundable.

Social-media draw. One follower is drawn at random among those who liked and commented on the designated post on the Instagram account @hydronautes, and wins a full day aboard L'Hydronaute. This draw is not organised, sponsored or administered by Instagram. Terms and draw date are stated on the relevant post.

Entrants' data is used solely to run the draw and deleted afterwards. The full rules are available on request at hydronaute@biutopic.com.

FAQ

How do I book?
Pick your dates in the calendar, then pay the 10% deposit online. Your dates are locked as soon as the payment clears.

What's included?
A self-piloted voyage on the Erdre aboard L'Hydronaute — you take the helm after a full briefing. Up to 8 passengers. Prize-draw outings are separate group events accompanied by the founder.

Is the deposit refundable?
Yes, until the voyage is confirmed. Once confirmed it is donated to Plastic Odyssey and non-refundable. See “Booking & refunds” above. The deposit is 10% of the total price shared with your availability confirmation.

Do I need a boat licence?
No. L'Hydronaute is hired under the French inland-waterway licence-free rental regime (bateau sans permis): speed-limited navigation with a mandatory briefing before departure.

How can I win a trip?
Through the prize draws (see “Prize-draw rules”).

A question?
hydronaute@biutopic.com