Who were three explorers traveled mainly by water?

Three notable explorers who traveled mainly by water are Ferdinand Magellan, Christopher Columbus, and Jacques Cousteau. Magellan is renowned for leading the first expedition to circumnavigate the globe, while Columbus is famous for his voyages that opened the Americas to European exploration. Jacques Cousteau, a 20th-century oceanographer, explored the world's oceans and promoted marine conservation through his underwater documentaries and research.