Knut Haugland Heyerdahl in 1944 at a paramilitary training camp in England. It was here that Haugland first heard of Heyerdahl's theories about Polynesian migration patterns, and his plans to cross the Pacific on a balsa wood raft. In 1947 Haugland was invited by Heyerdahl to join the Kon-Tiki expedition as a radio operator. On the expedition Haugland and Torstein Raaby (another former resistance member) were in frequent radio contact with American amateur operators, sending meteorological and hydrographic data to be passed on to the Meteorological Institute in Washington, DC. Despite the tiny radio which had an output of only 6 watts,
Pre-Columbian rafts It was during these trade voyages that South American sailors may have introduced metallurgy to Mexico. The purported trade between Ecuador and Mexico consisted of luxury items, including Spondylus (spiny oyster) and Strombus (conch) shells, which were prominently traded from their origins in the warm ocean waters of Ecuador throughout the Andes and up and down the coasts of South America. Since the voyage of the Kon-Tiki in 1947, there have been numerous crossings of the Pacific Ocean by raft from South America to Polynesia. In the 1990s, four attempts to sail a raft from Ecuador to Mexico failed, although