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The Christavia Mk I is a Canadian two-seats in tandem homebuilt aircraft designed by Ron Mason. The aircraft is supplied in the form of plans for amateur construction. Designed for missionary flying in Africa, the aircraft's name means "Christ-in-Aviation". The Christavia Mk II is a side-by-side configuration version. The Christavia Mk I was first completed and registered as a Christavia CA-05 with Transport Canada on October 1, 1981 and first flew in 1982. Over 350 had been completed and flown by 2002.