 It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a local reliever airport facility.Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Grosse Ile Municipal Airport is assigned ONZ by the FAA but has no designation from the IATA.In 1929, the airport opened as Naval Reserve Air Base Ile, consisting of a training school, seaplane base and dirigible hangar.