Brothers Jude Massey and Greg Bailey departed Thursday from the Canary Islands on a 3,000-mile journey across the Atlantic Ocean on a rowboat. “Doing this row on a vegan diet,” 18-year-old Massey told Huffington Post UK, “is a way to prove to people that you can do extreme challenges and get all the nutrients you need through a plant-based diet. There’s no lack of protein or other nutrients. It’s a great way to challenge people’s opinions on traditional English diets and extreme athlete diets.” Massey and Bailey—the latter of whom is vegetarian but agreed to support his vegan brother on the journey—will consume three dehydrated vegan meals per day. The men (known as the “Ocean Brothers”) decided to row across the Atlantic—taking turns sleeping in a covered area of the boat—as a tribute to their father/stepfather, who died of skin cancer in October, and plan to arrive in Barbados in approximately 10 weeks.