Who named the Bermuda triangle and why?

The former- and well-known Fishing commentator of Radio and TV fame- Vincent ( Gadabout) Gaddis, wrote a book about the mystery- called Invisible Horizons, and this popularized the term Bermuda Triangle. It is not known if the Flying Fisherman-as he was known, ever scouted out the area in his Amphibious plane- a Republic Seabee.