acuc, american and canadian underwater certifications inc. is an international recreational diving membership and diver training organization. formerly known as the association of canadian underwater councils, it was formed as a not for profit collective of regional dive councils to create a national forum for their common interest and concerns. it soon began developing a training curriculum better suited to the canadian conditions that many other training agencies neglected. it was later incorporated in 1986 in canada by robert cronkwright. cronkwright was a national association of underwater instructors (naui) instructor from 1969 to 1971. in 1971 he crossed over to the association of canadian underwater councils and became a training director, secretary/treasurer and later vice president of the association (1972–1984). he was also training director for the ontario underwater council (ouc) in the 1970s.