Spanish explorer Kitin Munoz set sail on Sunday from Barcelona in a primitive reed boat to try to prove that ancient seafarers could have crossed the Atlantic Ocean. Munoz, 43, and his multinational seven-man crew hope to reach Colombia's Caribbean coast on the 20-m (65-foot) Mata Rangi III. He made two attempts to cross the Pacific Ocean during the late 1990s, but both ended in disaster. "We have constructed a boat identical to the boats used by ancient navigators, without any modern materials such as plastics," he said. The boat was built in the Olympic port of Barcelona from reeds specially imported from Lake Titicaca on the Peru-Bolivia border.