The Gulfstream V (or G-V or GV) is a business jet aircraft produced by Gulfstream Aerospace. It is also used by the US military under the designation C-37A. The G500 and G550 are improved versions which are currently in production. The Gulfstream G550 was formerly known as the Gulfstream V SP (G-V SP).

Design and development
The Gulfstream V (also called the G-V) first flew in 1995, was certified in 1997, and was one of the first "ultra-long range" (~6,000-nautical-mile (11,000 km)) business aircraft. Capable of carrying up to 16 people in standard seating configurations, and able to fly up to 6,500 nmi (12,000 km), the GV became the longest range business jet ever made (at the time of its introduction). Total production of the Gulfstream V was 191 aircraft.

C-37A
Designated C-37A in U.S. Air Force service, the Gulfstream V is used by government and Defense Departmentofficials. The US Coast Guard operates two C-37A for transportation of the Department of Homeland Security Secretary and the Commandant of the Coast Guard. The US Navy operates one C-37A.

The aircraft has a flight management system with a worldwide satellite-based Global Positioning System. The C-37A is capable of cruising at 51,000 feet (16,000 m). Features include enhanced weather radar, autopilot and head-up display for the pilot. Safety features include Enhanced Vision Systems that allows increased visibility in adverse environments. The aircraft is also equipped with commercial and military communications equipment to provide secure voice and data capability. The U.S. Air Force equips the C-37A with a basic crew of two pilots, one flight engineer, one communications systems operator, and one flight attendant.

Operational history
The 89th Airlift Wing's 99th Airlift Squadron, Andrews Air Force Base, Maryland, operates four C-37As. The 6th Air Mobility Wing's 310th Airlift Squadron,MacDill Air Force Base, Florida operates three C-37As. The 15th Airlift Wing's 65th Airlift Squadron, Hickam Air Force Base, Hawaii operates one C-37A. The 86th Airlift Wing's 309th Airlift Squadron, Chievres Air Base, Belgium has one C-37A. The Executive Transport Detachment Pacific, Hickam Air Force Base, Hawaii operates one C-37A. The United States Army Priority Air Transport Det. (USAPAT), Andrews AFB, MD, operates two C-37As

On March 11, 2005, Gulfstream delivered an ultra-long-range G-V to the National Center for Atmospheric Research (NCAR). The aircraft—known as the High-performance, Instrumented Airborne Platform for Environmental Research (HIAPER)—is being used by environmental and atmospheric scientists from both public and private research facilities. The GV was chosen by NCAR for its exceptionally high cruising altitude, long range, endurance, payload, reliability, and low operating costs, as well as worldwide product support. The aircraft is based in Boulder, Colorado. The HIAPER Gulfstream V is currently being modified to accept wing/pylon mounted instrumentation.