A shuttlecraft of the Enterprise-D fitted with Doctor Reyga's metaphasic shield in 2369 and flown into a star's corona, first by Jo'Bril and then by Beverly Crusher.
The Justman was a shuttlecraft of the Enterprise-D. The name is a tribute to Robert Justman, a producer on the Original Series and The Next Generation.
It is the test vehicle in Suspicions. The Ferengi scientist Reyga claims to have invented a shield that lets a ship enter a star's corona, and Beverly Crusher invites other scientists to see it tried. The Takaran Jo'Bril pilots the Justman into the star Vaytan and appears to die. Reyga is then found dead, an apparent suicide.
Crusher, relieved of duty for ordering an autopsy against the wishes of Reyga's family, takes the Justman into the corona herself to prove that the shield works. Jo'Bril, who had faked his death in order to steal the design, comes out of hiding aboard, and she kills him.