Airlines providing passenger feed for the Continental hub located at Houston Intercontinental Airport (IAH). Scenic Air - Former scheduled passenger airline operator with service from Oakland International Airport (OAK). Southeast Airlines - Former scheduled passenger airline operator. Susquehanna Airlines - Former scheduled passenger airline operator. Military operators Hellenic Air Force - One aircraft delivered in July 1964, now preserved at Dekelia Air Base. United States Army - The United States Army Corps of Engineers operated a single Gulfstream I (with a civilian colour scheme and registration) between 1961 and 1981. The US Army also later received at least one Gulfstream I that had been confiscated from drug dealers. United States Coast Guard United States Marine Corps United States Navy Specifications See also References Notes Bibliography External links The Grumman G-159 Gulfstream I on Airliners.net "Dart-Powered Executive" a 1959 Flight article on the Gulfstream "Online Gulfstream 1 Museum" Information on every G159 manufacturered 1950s United States business aircraft Gulfstream I Gulfstream I Low-wing aircraft Aircraft first flown in 1958 Twin-turboprop tractor aircraft