The twin ship, Doug, already arrived in Port Canaveral.
The ships will recover fairings from the water and support droneship operations.
Firefly attempted the first launch of their Alpha rocket on Thursday.
One of the four engines shut down a few seconds into flight; resulting in decreased power.
Firefly triggered the flight termination system and the rocket was destroyed.
Virgin Galactic has been grounded by the FAA this week, pending the result of an investigation.
More top stories, like the first booster return for SpaceX's ship 'A Shortfall of Gravitas' are on our dedicated article.