The Gulfstream G100 is a mid-sized business jet, formerly known as the Astra SPX, manufactured by the Israeli Aerospace Industries (IAI) for Gulfstream Aerospace. The IAI began deliveries of the twin-engine business jet in 1986. The aircraft is operated by a handful of global military forces and companies, notably the United States Navy (USN). The USN operates the jet as the C-38A Courier. This article explores the four surprising users of the jet.