 A young American couple, Helen and Frank Schreider, converted one which they called "La Tortuga" and traveled from Los Angeles to the Southern tip of South America (1954–1956).They later converted another one called "Tortuga II" which they used on National Geographic expeditions in India (1959) and Indonesia (1961).World War II British paratrooper veteran Lionel Force purchased a GPA from Levy's Surplus in Toronto, Ontario, Canada, and called it "The Amphib".