HMX-1

Marine Helicopter Squadron 1
HMX-1 insignia
Active1 December 1947 – present
Country United States
Branch United States Marine Corps
TypeMedium Helicopter Squadron
RoleVIP Transport
Operational Testing and Evaluation
Part ofHeadquarters Marine Corps
Garrison/HQMarine Corps Air Facility Quantico
Nickname(s)"The Nighthawks", "Marine One"
Tail Coden/a
Commanders
Current
commander
Colonel Bradley J. Harms
Notable
commanders
Keith B. McCutcheon
Edward C. Dyer

Marine Helicopter Squadron One (HMX-1) is a United States Marine Corps helicopter squadron responsible for the transportation of the president and vice president of the United States, heads of state, Department of Defense officials, and other VIPs as directed by the Marine Corps and White House Military Office. A Marine helicopter with the president aboard uses the call sign "Marine One". Previously, HMX-1 was also tasked with operational test and evaluation (OT&E). This task was reassigned to VMX-1 in Yuma, Arizona; since the contract award of the new presidential helicopter in 2014 to Sikorsky Aircraft, however, HMX-1 has assumed the temporary role of OT&E for this platform, because of its unique nature and mission[clarification needed]. The VH-92A first flew in 2017 and became operational in 2024. Nicknamed "Nighthawks", HMX-1 is headquartered at Marine Corps Air Facility Quantico, Virginia, and maintains detachments at Joint Base Anacostia–Bolling in Washington, D.C., and Joint Base Andrews Naval Air Facility in Maryland.