Iceland is also one of the leading countries in ocean rowing. Icelandic explorer and endurance athlete Fiann Paulholds the highest number of performance-based ''Guinness World Records'' within a single athletic discipline. As of 2020, he is the first and only person to achieve the Ocean Explorers Grand Slam (performing open-water crossings on each of the five oceans using human-powered vessels) and has claimed overall speed ''Guinness World Records'' for the fastest rowing of all four oceans (Atlantic, Indian, Pacific and Arctic) in a human-powered row boat. He had achieved a total of 41, including 33 performance based ''Guinness World Records'' by 2020.