H. Dan Hill owns and operates Mach One Air Charters, Inc. in southern California. He maintains several certifications including as a turbo-jet flight engineer and holds certifications that allow him to be a captain on jets. Flight professionals with a CFII certification have completed training to be expert instructors for instrument flying conditions and have obtained 10 hours each of ground and flight training on teaching other pilots to fly solely by instruments when visual references are not available.