During the Guinness World Record attempt, you’ll be able to track the real-time location of Jonuka400 dinghy at all times.
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Two missions. One goal. Awareness and faster diagnosis of a rare disease.
In June 2025, 16 year old Jona and her father Luka will embark on an incredible adventure – together, they aim to set a Guinness World Record for the longest double-handed dinghy sailing distance, without assistance and without touching land.
Their mission? To raise awareness of a rare and life threatening disease – pulmonary arterial hypertension (PAH) – and to collect funds for the next big step that will carry their message even further.
In September 2025, Uroš Kraševac, an exceptional Slovenian sailor, plans to sail across the Atlantic in the extreme solo regatta Mini Transat. It’s a raw and elemental sailing challenge, held every two years since 1977.
In this race, each sailor must cross the Atlantic completely alone in a boat only 6.5 meters long – without advanced navigation systems and without any contact with the outside world.
This widely media-covered and high-impact event represents one of the most effective platforms for raising awareness – where Uroš intends to make full use of it. Throughout this extraordinary challenge, he will be a strong voice for PAH – a disease that takes your breath away, quite literally.
The Mini Transat isn’t a race you simply sign up for – it’s a journey that demands months of preparation. For this reason, all proceeds from The Breathless Mission – the Guinness World Record attempt – will be fully allocated to securing Uroš Kraševac’s entry into the race.
Together, we can make pulmonary hypertension visible – and show the world that even when life takes your breath away, there is still wind in your sails.
The longest unsupported distance sailed in a double-handed dinghy without land contact
June 13–23, 2025
Setting sail in a BENETEAU First 14 SE sailboat
Exact start date and location will be announced later – depending on the weather. The entire sailing will take place in the Adriatic sea.
Mini Transat – the Atlantic crossing on the smallest ocean racing sailboat
September 21, 2025
Start of the Mini Transat race – Les Sables d’Olonne, France
Pulmonary hypertension: a lung and heart disease with non-specific symptoms
Shortness of breath, fatigue, dizziness – symptoms we often attribute to other illnesses or simply to feeling unwell. But sometimes, these very signs point to a rare and serious condition – pulmonary hypertension.
We want to support patients who face daily limitations that most of us don’t even notice.
We aim to raise awareness of this disease, which can significantly reduce the time between the first symptoms and receiving a proper diagnosis and treatment.
An early diagnosis can greatly improve the quality of life for patients.
Without appropriate supportive treatment, the rapid progression of the disease can lead to the last resort for survival – a lung and/or heart transplant, and sadly, sometimes even death.
We’re excited to announce the next chapter of the Jonuka 400 project – a charity prize draw for the boat that carried Jona and Luka across 347 nautical miles and into the Guinness World Records.
Join the charity prize draw and support raising awareness of pulmonary hypertension as well as Uroš Kraševc in his participation in the Mini Transat!
