VP-03 (also referred to in some sources as PF04) was a sub-orbital spaceflight of the SpaceShipTwo-class VSS Unity which took place on 13 December 2018, piloted by Mark P. Stucky and co-piloted by Frederick W. "CJ" Sturckow.

On three separate one-man sub-orbital flights, pilots Mike Melvill and Brian Binnie reached a maximum altitude above 100 kilometers, thereby crossing the Kármán line, the internationally recognized boundary of outer space.

SpaceShipOne was carried into flight in a parasite configuration by White Knight, its mother ship, from which point it flew into space.

In May 2013, retired NASA astronaut and four-time Space Shuttle veteran Frederick "CJ" Sturckow joined Virgin Galactic as a test pilot.

On 31 October 2014, the Enterprise was destroyed in a catastrophic breakup, killing its co-pilot Michael Alsbury and seriously injuring its lead pilot Peter Siebold.

[4] On 13 December 2018, at an altitude of 43,000 ft (13,000 m), the VMS Eve released the VSS Unity for its fourth powered test flight.